modules/luci-base/htdocs/luci-static/resources/cbi.js

   1 /*
   2         LuCI - Lua Configuration Interface
   3
   4         Copyright 2008 Steven Barth <steven@midlink.org>
   5         Copyright 2008-2012 Jo-Philipp Wich <jow@openwrt.org>
   6
   7         Licensed under the Apache License, Version 2.0 (the "License");
   8         you may not use this file except in compliance with the License.
   9         You may obtain a copy of the License at
  10
  11         http://www.apache.org/licenses/LICENSE-2.0
  12 */
  13
  14 var cbi_d = [];
  15 var cbi_t = [];
  16 var cbi_strings = { path: {}, label: {} };
  17
  18 function Int(x) {
  19         return (/^-?\d+$/.test(x) ? +x : NaN);
  20 }
  21
  22 function Dec(x) {
  23         return (/^-?\d+(?:\.\d+)?$/.test(x) ? +x : NaN);
  24 }
  25
  26 function IPv4(x) {
  27         if (!x.match(/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/))
  28                 return null;
  29
  30         if (RegExp.$1 > 255 || RegExp.$2 > 255 || RegExp.$3 > 255 || RegExp.$4 > 255)
  31                 return null;
  32
  33         return [ +RegExp.$1, +RegExp.$2, +RegExp.$3, +RegExp.$4 ];
  34 }
  35
  36 function IPv6(x) {
  37         if (x.match(/^([a-fA-F0-9:]+):(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/)) {
  38                 var v6 = RegExp.$1, v4 = IPv4(RegExp.$2);
  39
  40                 if (!v4)
  41                         return null;
  42
  43                 x = v6 + ':' + (v4[0] * 256 + v4[1]).toString(16)
  44                        + ':' + (v4[2] * 256 + v4[3]).toString(16);
  45         }
  46
  47         if (!x.match(/^[a-fA-F0-9:]+$/))
  48                 return null;
  49
  50         var prefix_suffix = x.split(/::/);
  51
  52         if (prefix_suffix.length > 2)
  53                 return null;
  54
  55         var prefix = (prefix_suffix[0] || '0').split(/:/);
  56         var suffix = prefix_suffix.length > 1 ? (prefix_suffix[1] || '0').split(/:/) : [];
  57
  58         if (suffix.length ? (prefix.length + suffix.length > 7) : (prefix.length > 8))
  59                 return null;
  60
  61         var i, word;
  62         var words = [];
  63
  64         for (i = 0, word = parseInt(prefix[0], 16); i < prefix.length; word = parseInt(prefix[++i], 16))
  65                 if (prefix[i].length <= 4 && !isNaN(word) && word <= 0xFFFF)
  66                         words.push(word);
  67                 else
  68                         return null;
  69
  70         for (i = 0; i < (8 - prefix.length - suffix.length); i++)
  71                 words.push(0);
  72
  73         for (i = 0, word = parseInt(suffix[0], 16); i < suffix.length; word = parseInt(suffix[++i], 16))
  74                 if (suffix[i].length <= 4 && !isNaN(word) && word <= 0xFFFF)
  75                         words.push(word);
  76                 else
  77                         return null;
  78
  79         return words;
  80 }
  81
  82 var cbi_validators = {
  83
  84         'integer': function()
  85         {
  86                 return !!Int(this);
  87         },
  88
  89         'uinteger': function()
  90         {
  91                 return (Int(this) >= 0);
  92         },
  93
  94         'float': function()
  95         {
  96                 return !!Dec(this);
  97         },
  98
  99         'ufloat': function()
 100         {
 101                 return (Dec(this) >= 0);
 102         },
 103
 104         'ipaddr': function()
 105         {
 106                 return cbi_validators.ip4addr.apply(this) ||
 107                         cbi_validators.ip6addr.apply(this);
 108         },
 109
 110         'ip4addr': function()
 111         {
 112                 var m = this.match(/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(?:\/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})|\/(\d{1,2}))?$/);
 113                 return !!(m && IPv4(m[1]) && (m[2] ? IPv4(m[2]) : (m[3] ? cbi_validators.ip4prefix.apply(m[3]) : true)));
 114         },
 115
 116         'ip6addr': function()
 117         {
 118                 var m = this.match(/^([0-9a-fA-F:.]+)(?:\/(\d{1,3}))?$/);
 119                 return !!(m && IPv6(m[1]) && (m[2] ? cbi_validators.ip6prefix.apply(m[2]) : true));
 120         },
 121
 122         'ip4prefix': function()
 123         {
 124                 return !isNaN(this) && this >= 0 && this <= 32;
 125         },
 126
 127         'ip6prefix': function()
 128         {
 129                 return !isNaN(this) && this >= 0 && this <= 128;
 130         },
 131
 132         'cidr': function()
 133         {
 134                 return cbi_validators.cidr4.apply(this) ||
 135                         cbi_validators.cidr6.apply(this);
 136         },
 137
 138         'cidr4': function()
 139         {
 140                 var m = this.match(/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\/(\d{1,2})$/);
 141                 return !!(m && IPv4(m[1]) && cbi_validators.ip4prefix.apply(m[2]));
 142         },
 143
 144         'cidr6': function()
 145         {
 146                 var m = this.match(/^([0-9a-fA-F:.]+)\/(\d{1,3})$/);
 147                 return !!(m && IPv6(m[1]) && cbi_validators.ip6prefix.apply(m[2]));
 148         },
 149
 150         'ipnet4': function()
 151         {
 152                 var m = this.match(/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/);
 153                 return !!(m && IPv4(m[1]) && IPv4(m[2]));
 154         },
 155
 156         'ipnet6': function()
 157         {
 158                 var m = this.match(/^([0-9a-fA-F:.]+)\/([0-9a-fA-F:.]+)$/);
 159                 return !!(m && IPv6(m[1]) && IPv6(m[2]));
 160         },
 161
 162         'ip6hostid': function()
 163         {
 164                 if (this == "eui64" || this == "random")
 165                         return true;
 166
 167                 var v6 = IPv6(this);
 168                 return !(!v6 || v6[0] || v6[1] || v6[2] || v6[3]);
 169         },
 170
 171         'ipmask': function()
 172         {
 173                 return cbi_validators.ipmask4.apply(this) ||
 174                         cbi_validators.ipmask6.apply(this);
 175         },
 176
 177         'ipmask4': function()
 178         {
 179                 return cbi_validators.cidr4.apply(this) ||
 180                         cbi_validators.ipnet4.apply(this) ||
 181                         cbi_validators.ip4addr.apply(this);
 182         },
 183
 184         'ipmask6': function()
 185         {
 186                 return cbi_validators.cidr6.apply(this) ||
 187                         cbi_validators.ipnet6.apply(this) ||
 188                         cbi_validators.ip6addr.apply(this);
 189         },
 190
 191         'port': function()
 192         {
 193                 var p = Int(this);
 194                 return (p >= 0 && p <= 65535);
 195         },
 196
 197         'portrange': function()
 198         {
 199                 if (this.match(/^(\d+)-(\d+)$/))
 200                 {
 201                         var p1 = +RegExp.$1;
 202                         var p2 = +RegExp.$2;
 203                         return (p1 <= p2 && p2 <= 65535);
 204                 }
 205
 206                 return cbi_validators.port.apply(this);
 207         },
 208
 209         'macaddr': function()
 210         {
 211                 return (this.match(/^([a-fA-F0-9]{2}:){5}[a-fA-F0-9]{2}$/) != null);
 212         },
 213
 214         'host': function(ipv4only)
 215         {
 216                 return cbi_validators.hostname.apply(this) ||
 217                         ((ipv4only != 1) && cbi_validators.ipaddr.apply(this)) ||
 218                         ((ipv4only == 1) && cbi_validators.ip4addr.apply(this));
 219         },
 220
 221         'hostname': function(strict)
 222         {
 223                 if (this.length <= 253)
 224                         return (this.match(/^[a-zA-Z0-9_]+$/) != null ||
 225                                 (this.match(/^[a-zA-Z0-9_][a-zA-Z0-9_\-.]*[a-zA-Z0-9]$/) &&
 226                                  this.match(/[^0-9.]/))) &&
 227                                (!strict || !this.match(/^_/));
 228
 229                 return false;
 230         },
 231
 232         'network': function()
 233         {
 234                 return cbi_validators.uciname.apply(this) ||
 235                         cbi_validators.host.apply(this);
 236         },
 237
 238         'hostport': function(ipv4only)
 239         {
 240                 var hp = this.split(/:/);
 241
 242                 if (hp.length == 2)
 243                         return (cbi_validators.host.apply(hp[0], ipv4only) &&
 244                                 cbi_validators.port.apply(hp[1]));
 245
 246                 return false;
 247         },
 248
 249         'ip4addrport': function()
 250         {
 251                 var hp = this.split(/:/);
 252
 253                 if (hp.length == 2)
 254                         return (cbi_validators.ipaddr.apply(hp[0]) &&
 255                                 cbi_validators.port.apply(hp[1]));
 256                 return false;
 257         },
 258
 259         'ipaddrport': function(bracket)
 260         {
 261                 if (this.match(/^([^\[\]:]+):([^:]+)$/)) {
 262                         var addr = RegExp.$1
 263                         var port = RegExp.$2
 264                         return (cbi_validators.ip4addr.apply(addr) &&
 265                                 cbi_validators.port.apply(port));
 266                 } else if ((bracket == 1) && (this.match(/^\[(.+)\]:([^:]+)$/))) {
 267                         var addr = RegExp.$1
 268                         var port = RegExp.$2
 269                         return (cbi_validators.ip6addr.apply(addr) &&
 270                                 cbi_validators.port.apply(port));
 271                 } else if ((bracket != 1) && (this.match(/^([^\[\]]+):([^:]+)$/))) {
 272                         var addr = RegExp.$1
 273                         var port = RegExp.$2
 274                         return (cbi_validators.ip6addr.apply(addr) &&
 275                                 cbi_validators.port.apply(port));
 276                 } else {
 277                         return false;
 278                 }
 279         },
 280
 281         'wpakey': function()
 282         {
 283                 var v = this;
 284
 285                 if( v.length == 64 )
 286                         return (v.match(/^[a-fA-F0-9]{64}$/) != null);
 287                 else
 288                         return (v.length >= 8) && (v.length <= 63);
 289         },
 290
 291         'wepkey': function()
 292         {
 293                 var v = this;
 294
 295                 if ( v.substr(0,2) == 's:' )
 296                         v = v.substr(2);
 297
 298                 if( (v.length == 10) || (v.length == 26) )
 299                         return (v.match(/^[a-fA-F0-9]{10,26}$/) != null);
 300                 else
 301                         return (v.length == 5) || (v.length == 13);
 302         },
 303
 304         'uciname': function()
 305         {
 306                 return (this.match(/^[a-zA-Z0-9_]+$/) != null);
 307         },
 308
 309         'range': function(min, max)
 310         {
 311                 var val = Dec(this);
 312                 return (val >= +min && val <= +max);
 313         },
 314
 315         'min': function(min)
 316         {
 317                 return (Dec(this) >= +min);
 318         },
 319
 320         'max': function(max)
 321         {
 322                 return (Dec(this) <= +max);
 323         },
 324
 325         'rangelength': function(min, max)
 326         {
 327                 var val = '' + this;
 328                 return ((val.length >= +min) && (val.length <= +max));
 329         },
 330
 331         'minlength': function(min)
 332         {
 333                 return ((''+this).length >= +min);
 334         },
 335
 336         'maxlength': function(max)
 337         {
 338                 return ((''+this).length <= +max);
 339         },
 340
 341         'or': function()
 342         {
 343                 for (var i = 0; i < arguments.length; i += 2)
 344                 {
 345                         if (typeof arguments[i] != 'function')
 346                         {
 347                                 if (arguments[i] == this)
 348                                         return true;
 349                                 i--;
 350                         }
 351                         else if (arguments[i].apply(this, arguments[i+1]))
 352                         {
 353                                 return true;
 354                         }
 355                 }
 356                 return false;
 357         },
 358
 359         'and': function()
 360         {
 361                 for (var i = 0; i < arguments.length; i += 2)
 362                 {
 363                         if (typeof arguments[i] != 'function')
 364                         {
 365                                 if (arguments[i] != this)
 366                                         return false;
 367                                 i--;
 368                         }
 369                         else if (!arguments[i].apply(this, arguments[i+1]))
 370                         {
 371                                 return false;
 372                         }
 373                 }
 374                 return true;
 375         },
 376
 377         'neg': function()
 378         {
 379                 return cbi_validators.or.apply(
 380                         this.replace(/^[ \t]*![ \t]*/, ''), arguments);
 381         },
 382
 383         'list': function(subvalidator, subargs)
 384         {
 385                 if (typeof subvalidator != 'function')
 386                         return false;
 387
 388                 var tokens = this.match(/[^ \t]+/g);
 389                 for (var i = 0; i < tokens.length; i++)
 390                         if (!subvalidator.apply(tokens[i], subargs))
 391                                 return false;
 392
 393                 return true;
 394         },
 395         'phonedigit': function()
 396         {
 397                 return (this.match(/^[0-9\*#!\.]+$/) != null);
 398         },
 399         'timehhmmss': function()
 400         {
 401                 return (this.match(/^[0-6][0-9]:[0-6][0-9]:[0-6][0-9]$/) != null);
 402         },
 403         'dateyyyymmdd': function()
 404         {
 405                 if (this == null) {
 406                         return false;
 407                 }
 408                 if (this.match(/^(\d\d\d\d)-(\d\d)-(\d\d)/)) {
 409                         var year = RegExp.$1;
 410                         var month = RegExp.$2;
 411                         var day = RegExp.$2
 412
 413                         var days_in_month = [ 31, 28, 31, 30, 31, 30, 31, 31, 30 , 31, 30, 31 ];
 414                         function is_leap_year(year) {
 415                                 return ((year % 4) == 0) && ((year % 100) != 0) || ((year % 400) == 0);
 416                         }
 417                         function get_days_in_month(month, year) {
 418                                 if ((month == 2) && is_leap_year(year)) {
 419                                         return 29;
 420                                 } else {
 421                                         return days_in_month[month];
 422                                 }
 423                         }
 424                         /* Firewall rules in the past don't make sense */
 425                         if (year < 2015) {
 426                                 return false;
 427                         }
 428                         if ((month <= 0) || (month > 12)) {
 429                                 return false;
 430                         }
 431                         if ((day <= 0) || (day > get_days_in_month(month, year))) {
 432                                 return false;
 433                         }
 434                         return true;
 435
 436                 } else {
 437                         return false;
 438                 }
 439         }
 440 };
 441
 442
 443 function cbi_d_add(field, dep, index) {
 444         var obj = (typeof(field) === 'string') ? document.getElementById(field) : field;
 445         if (obj) {
 446                 var entry
 447                 for (var i=0; i<cbi_d.length; i++) {
 448                         if (cbi_d[i].id == obj.id) {
 449                                 entry = cbi_d[i];
 450                                 break;
 451                         }
 452                 }
 453                 if (!entry) {
 454                         entry = {
 455                                 "node": obj,
 456                                 "id": obj.id,
 457                                 "parent": obj.parentNode.id,
 458                                 "deps": [],
 459                                 "index": index
 460                         };
 461                         cbi_d.unshift(entry);
 462                 }
 463                 entry.deps.push(dep)
 464         }
 465 }
 466
 467 function cbi_d_checkvalue(target, ref) {
 468         var t = document.getElementById(target);
 469         var value;
 470
 471         if (!t) {
 472                 var tl = document.getElementsByName(target);
 473
 474                 if( tl.length > 0 && (tl[0].type == 'radio' || tl[0].type == 'checkbox'))
 475                         for( var i = 0; i < tl.length; i++ )
 476                                 if( tl[i].checked ) {
 477                                         value = tl[i].value;
 478                                         break;
 479                                 }
 480
 481                 value = value ? value : "";
 482         } else if (!t.value) {
 483                 value = "";
 484         } else {
 485                 value = t.value;
 486
 487                 if (t.type == "checkbox") {
 488                         value = t.checked ? value : "";
 489                 }
 490         }
 491
 492         return (value == ref)
 493 }
 494
 495 function cbi_d_check(deps) {
 496         var reverse;
 497         var def = false;
 498         for (var i=0; i<deps.length; i++) {
 499                 var istat = true;
 500                 reverse = false;
 501                 for (var j in deps[i]) {
 502                         if (j == "!reverse") {
 503                                 reverse = true;
 504                         } else if (j == "!default") {
 505                                 def = true;
 506                                 istat = false;
 507                         } else {
 508                                 istat = (istat && cbi_d_checkvalue(j, deps[i][j]))
 509                         }
 510                 }
 511
 512                 if (istat ^ reverse) {
 513                         return true;
 514                 }
 515         }
 516         return def;
 517 }
 518
 519 function cbi_d_update() {
 520         var state = false;
 521         for (var i=0; i<cbi_d.length; i++) {
 522                 var entry = cbi_d[i];
 523                 var node  = document.getElementById(entry.id);
 524                 var parent = document.getElementById(entry.parent);
 525
 526                 if (node && node.parentNode && !cbi_d_check(entry.deps)) {
 527                         node.parentNode.removeChild(node);
 528                         state = true;
 529                 } else if (parent && (!node || !node.parentNode) && cbi_d_check(entry.deps)) {
 530                         var next = undefined;
 531
 532                         for (next = parent.firstChild; next; next = next.nextSibling) {
 533                                 if (next.getAttribute && parseInt(next.getAttribute('data-index'), 10) > entry.index) {
 534                                         break;
 535                                 }
 536                         }
 537
 538                         if (!next) {
 539                                 parent.appendChild(entry.node);
 540                         } else {
 541                                 parent.insertBefore(entry.node, next);
 542                         }
 543
 544                         state = true;
 545                 }
 546
 547                 // hide optionals widget if no choices remaining
 548                 if (parent && parent.parentNode && parent.getAttribute('data-optionals'))
 549                         parent.parentNode.style.display = (parent.options.length <= 1) ? 'none' : '';
 550         }
 551
 552         if (entry && entry.parent) {
 553                 if (!cbi_t_update())
 554                         cbi_tag_last(parent);
 555         }
 556
 557         if (state) {
 558                 cbi_d_update();
 559         }
 560 }
 561
 562 function cbi_init() {
 563         var nodes;
 564
 565         nodes = document.querySelectorAll('[data-strings]');
 566
 567         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 568                 var str = JSON.parse(node.getAttribute('data-strings'));
 569                 for (var key in str) {
 570                         for (var key2 in str[key]) {
 571                                 var dst = cbi_strings[key] || (cbi_strings[key] = { });
 572                                     dst[key2] = str[key][key2];
 573                         }
 574                 }
 575         }
 576
 577         nodes = document.querySelectorAll('[data-depends]');
 578
 579         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 580                 var index = parseInt(node.getAttribute('data-index'), 10);
 581                 var depends = JSON.parse(node.getAttribute('data-depends'));
 582                 if (!isNaN(index) && depends.length > 0) {
 583                         for (var alt = 0; alt < depends.length; alt++) {
 584                                 cbi_d_add(node, depends[alt], index);
 585                         }
 586                 }
 587         }
 588
 589         nodes = document.querySelectorAll('[data-update]');
 590
 591         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 592                 var events = node.getAttribute('data-update').split(' ');
 593                 for (var j = 0, event; (event = events[j]) !== undefined; j++) {
 594                         cbi_bind(node, event, cbi_d_update);
 595                 }
 596         }
 597
 598         nodes = document.querySelectorAll('[data-choices]');
 599
 600         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 601                 var choices = JSON.parse(node.getAttribute('data-choices'));
 602                 var options = {};
 603
 604                 for (var j = 0; j < choices[0].length; j++)
 605                         options[choices[0][j]] = choices[1][j];
 606
 607                 var def = (node.getAttribute('data-optional') === 'true')
 608                         ? node.placeholder || '' : null;
 609
 610                 cbi_combobox_init(node, options, def,
 611                                   node.getAttribute('data-manual'));
 612         }
 613
 614         nodes = document.querySelectorAll('[data-dynlist]');
 615
 616         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 617                 var choices = JSON.parse(node.getAttribute('data-dynlist'));
 618                 var options = null;
 619
 620                 if (choices[0] && choices[0].length) {
 621                         options = {};
 622
 623                         for (var j = 0; j < choices[0].length; j++)
 624                                 options[choices[0][j]] = choices[1][j];
 625                 }
 626
 627                 cbi_dynlist_init(node, choices[2], choices[3], options);
 628         }
 629
 630         nodes = document.querySelectorAll('[data-type]');
 631
 632         for (var i = 0, node; (node = nodes[i]) !== undefined; i++) {
 633                 cbi_validate_field(node, node.getAttribute('data-optional') === 'true',
 634                                    node.getAttribute('data-type'));
 635         }
 636
 637         cbi_d_update();
 638 }
 639
 640 function cbi_bind(obj, type, callback, mode) {
 641         if (!obj.addEventListener) {
 642                 obj.attachEvent('on' + type,
 643                         function(){
 644                                 var e = window.event;
 645
 646                                 if (!e.target && e.srcElement)
 647                                         e.target = e.srcElement;
 648
 649                                 return !!callback(e);
 650                         }
 651                 );
 652         } else {
 653                 obj.addEventListener(type, callback, !!mode);
 654         }
 655         return obj;
 656 }
 657
 658 function cbi_combobox(id, values, def, man, focus) {
 659         var selid = "cbi.combobox." + id;
 660         if (document.getElementById(selid)) {
 661                 return
 662         }
 663
 664         var obj = document.getElementById(id)
 665         var sel = document.createElement("select");
 666                 sel.id = selid;
 667                 sel.index = obj.index;
 668                 sel.className = obj.className.replace(/cbi-input-text/, 'cbi-input-select');
 669
 670         if (obj.nextSibling) {
 671                 obj.parentNode.insertBefore(sel, obj.nextSibling);
 672         } else {
 673                 obj.parentNode.appendChild(sel);
 674         }
 675
 676         var dt = obj.getAttribute('cbi_datatype');
 677         var op = obj.getAttribute('cbi_optional');
 678
 679         if (!values[obj.value]) {
 680                 if (obj.value == "") {
 681                         var optdef = document.createElement("option");
 682                         optdef.value = "";
 683                         optdef.appendChild(document.createTextNode(typeof(def) === 'string' ? def : cbi_strings.label.choose));
 684                         sel.appendChild(optdef);
 685                 } else {
 686                         var opt = document.createElement("option");
 687                         opt.value = obj.value;
 688                         opt.selected = "selected";
 689                         opt.appendChild(document.createTextNode(obj.value));
 690                         sel.appendChild(opt);
 691                 }
 692         }
 693
 694         for (var i in values) {
 695                 var opt = document.createElement("option");
 696                 opt.value = i;
 697
 698                 if (obj.value == i) {
 699                         opt.selected = "selected";
 700                 }
 701
 702                 opt.appendChild(document.createTextNode(values[i]));
 703                 sel.appendChild(opt);
 704         }
 705
 706         var optman = document.createElement("option");
 707         optman.value = "";
 708         optman.appendChild(document.createTextNode(typeof(man) === 'string' ? man : cbi_strings.label.custom));
 709         sel.appendChild(optman);
 710
 711         obj.style.display = "none";
 712
 713         if (dt)
 714                 cbi_validate_field(sel, op == 'true', dt);
 715
 716         cbi_bind(sel, "change", function() {
 717                 if (sel.selectedIndex == sel.options.length - 1) {
 718                         obj.style.display = "inline";
 719                         sel.blur();
 720                         sel.parentNode.removeChild(sel);
 721                         obj.focus();
 722                 } else {
 723                         obj.value = sel.options[sel.selectedIndex].value;
 724                 }
 725
 726                 try {
 727                         cbi_d_update();
 728                 } catch (e) {
 729                         //Do nothing
 730                 }
 731         })
 732
 733         // Retrigger validation in select
 734         if (focus) {
 735                 sel.focus();
 736                 sel.blur();
 737         }
 738 }
 739
 740 function cbi_combobox_init(id, values, def, man) {
 741         var obj = (typeof(id) === 'string') ? document.getElementById(id) : id;
 742         cbi_bind(obj, "blur", function() {
 743                 cbi_combobox(obj.id, values, def, man, true);
 744         });
 745         cbi_combobox(obj.id, values, def, man, false);
 746 }
 747
 748 function cbi_filebrowser(id, defpath) {
 749         var field   = document.getElementById(id);
 750         var browser = window.open(
 751                 cbi_strings.path.browser + ( field.value || defpath || '' ) + '?field=' + id,
 752                 "luci_filebrowser", "width=300,height=400,left=100,top=200,scrollbars=yes"
 753         );
 754
 755         browser.focus();
 756 }
 757
 758 function cbi_browser_init(id, resource, defpath)
 759 {
 760         function cbi_browser_btnclick(e) {
 761                 cbi_filebrowser(id, defpath);
 762                 return false;
 763         }
 764
 765         var field = document.getElementById(id);
 766
 767         var btn = document.createElement('img');
 768         btn.className = 'cbi-image-button';
 769         btn.src = (resource || cbi_strings.path.resource) + '/cbi/folder.gif';
 770         field.parentNode.insertBefore(btn, field.nextSibling);
 771
 772         cbi_bind(btn, 'click', cbi_browser_btnclick);
 773 }
 774
 775 function cbi_dynlist_init(parent, datatype, optional, choices)
 776 {
 777         var prefix = parent.getAttribute('data-prefix');
 778         var holder = parent.getAttribute('data-placeholder');
 779
 780         var values;
 781
 782         function cbi_dynlist_redraw(focus, add, del)
 783         {
 784                 values = [ ];
 785
 786                 while (parent.firstChild)
 787                 {
 788                         var n = parent.firstChild;
 789                         var i = +n.index;
 790
 791                         if (i != del)
 792                         {
 793                                 if (n.nodeName.toLowerCase() == 'input')
 794                                         values.push(n.value || '');
 795                                 else if (n.nodeName.toLowerCase() == 'select')
 796                                         values[values.length-1] = n.options[n.selectedIndex].value;
 797                         }
 798
 799                         parent.removeChild(n);
 800                 }
 801
 802                 if (add >= 0)
 803                 {
 804                         focus = add+1;
 805                         values.splice(focus, 0, '');
 806                 }
 807                 else if (values.length == 0)
 808                 {
 809                         focus = 0;
 810                         values.push('');
 811                 }
 812
 813                 for (var i = 0; i < values.length; i++)
 814                 {
 815                         var t = document.createElement('input');
 816                                 t.id = prefix + '.' + (i+1);
 817                                 t.name = prefix;
 818                                 t.value = values[i];
 819                                 t.type = 'text';
 820                                 t.index = i;
 821                                 t.className = 'cbi-input-text';
 822
 823                         if (i == 0 && holder)
 824                         {
 825                                 t.placeholder = holder;
 826                         }
 827
 828                         var b = document.createElement('img');
 829                                 b.src = cbi_strings.path.resource + ((i+1) < values.length ? '/cbi/remove.gif' : '/cbi/add.gif');
 830                                 b.className = 'cbi-image-button';
 831
 832                         parent.appendChild(t);
 833                         parent.appendChild(b);
 834                         if (datatype == 'file')
 835                         {
 836                                 cbi_browser_init(t.id, null, parent.getAttribute('data-browser-path'));
 837                         }
 838
 839                         parent.appendChild(document.createElement('br'));
 840
 841                         if (datatype)
 842                         {
 843                                 cbi_validate_field(t.id, ((i+1) == values.length) || optional, datatype);
 844                         }
 845
 846                         if (choices)
 847                         {
 848                                 cbi_combobox_init(t.id, choices, '', cbi_strings.label.custom);
 849                                 b.index = i;
 850
 851                                 cbi_bind(b, 'keydown',  cbi_dynlist_keydown);
 852                                 cbi_bind(b, 'keypress', cbi_dynlist_keypress);
 853
 854                                 if (i == focus || -i == focus)
 855                                         b.focus();
 856                         }
 857                         else
 858                         {
 859                                 cbi_bind(t, 'keydown',  cbi_dynlist_keydown);
 860                                 cbi_bind(t, 'keypress', cbi_dynlist_keypress);
 861
 862                                 if (i == focus)
 863                                 {
 864                                         t.focus();
 865                                 }
 866                                 else if (-i == focus)
 867                                 {
 868                                         t.focus();
 869
 870                                         /* force cursor to end */
 871                                         var v = t.value;
 872                                         t.value = ' '
 873                                         t.value = v;
 874                                 }
 875                         }
 876
 877                         cbi_bind(b, 'click', cbi_dynlist_btnclick);
 878                 }
 879         }
 880
 881         function cbi_dynlist_keypress(ev)
 882         {
 883                 ev = ev ? ev : window.event;
 884
 885                 var se = ev.target ? ev.target : ev.srcElement;
 886
 887                 if (se.nodeType == 3)
 888                         se = se.parentNode;
 889
 890                 switch (ev.keyCode)
 891                 {
 892                         /* backspace, delete */
 893                         case 8:
 894                         case 46:
 895                                 if (se.value.length == 0)
 896                                 {
 897                                         if (ev.preventDefault)
 898                                                 ev.preventDefault();
 899
 900                                         return false;
 901                                 }
 902
 903                                 return true;
 904
 905                         /* enter, arrow up, arrow down */
 906                         case 13:
 907                         case 38:
 908                         case 40:
 909                                 if (ev.preventDefault)
 910                                         ev.preventDefault();
 911
 912                                 return false;
 913                 }
 914
 915                 return true;
 916         }
 917
 918         function cbi_dynlist_keydown(ev)
 919         {
 920                 ev = ev ? ev : window.event;
 921
 922                 var se = ev.target ? ev.target : ev.srcElement;
 923
 924                 if (se.nodeType == 3)
 925                         se = se.parentNode;
 926
 927                 var prev = se.previousSibling;
 928                 while (prev && prev.name != prefix)
 929                         prev = prev.previousSibling;
 930
 931                 var next = se.nextSibling;
 932                 while (next && next.name != prefix)
 933                         next = next.nextSibling;
 934
 935                 /* advance one further in combobox case */
 936                 if (next && next.nextSibling.name == prefix)
 937                         next = next.nextSibling;
 938
 939                 switch (ev.keyCode)
 940                 {
 941                         /* backspace, delete */
 942                         case 8:
 943                         case 46:
 944                                 var del = (se.nodeName.toLowerCase() == 'select')
 945                                         ? true : (se.value.length == 0);
 946
 947                                 if (del)
 948                                 {
 949                                         if (ev.preventDefault)
 950                                                 ev.preventDefault();
 951
 952                                         var focus = se.index;
 953                                         if (ev.keyCode == 8)
 954                                                 focus = -focus+1;
 955
 956                                         cbi_dynlist_redraw(focus, -1, se.index);
 957
 958                                         return false;
 959                                 }
 960
 961                                 break;
 962
 963                         /* enter */
 964                         case 13:
 965                                 cbi_dynlist_redraw(-1, se.index, -1);
 966                                 break;
 967
 968                         /* arrow up */
 969                         case 38:
 970                                 if (prev)
 971                                         prev.focus();
 972
 973                                 break;
 974
 975                         /* arrow down */
 976                         case 40:
 977                                 if (next)
 978                                         next.focus();
 979
 980                                 break;
 981                 }
 982
 983                 return true;
 984         }
 985
 986         function cbi_dynlist_btnclick(ev)
 987         {
 988                 ev = ev ? ev : window.event;
 989
 990                 var se = ev.target ? ev.target : ev.srcElement;
 991                 var input = se.previousSibling;
 992                 while (input && input.name != prefix) {
 993                         input = input.previousSibling;
 994                 }
 995
 996                 if (se.src.indexOf('remove') > -1)
 997                 {
 998                         input.value = '';
 999
1000                         cbi_dynlist_keydown({
1001                                 target:  input,
1002                                 keyCode: 8
1003                         });
1004                 }
1005                 else
1006                 {
1007                         cbi_dynlist_keydown({
1008                                 target:  input,
1009                                 keyCode: 13
1010                         });
1011                 }
1012
1013                 return false;
1014         }
1015
1016         cbi_dynlist_redraw(NaN, -1, -1);
1017 }
1018
1019
1020 function cbi_t_add(section, tab) {
1021         var t = document.getElementById('tab.' + section + '.' + tab);
1022         var c = document.getElementById('container.' + section + '.' + tab);
1023
1024         if( t && c ) {
1025                 cbi_t[section] = (cbi_t[section] || [ ]);
1026                 cbi_t[section][tab] = { 'tab': t, 'container': c, 'cid': c.id };
1027         }
1028 }
1029
1030 function cbi_t_switch(section, tab) {
1031         if( cbi_t[section] && cbi_t[section][tab] ) {
1032                 var o = cbi_t[section][tab];
1033                 var h = document.getElementById('tab.' + section);
1034                 for( var tid in cbi_t[section] ) {
1035                         var o2 = cbi_t[section][tid];
1036                         if( o.tab.id != o2.tab.id ) {
1037                                 o2.tab.className = o2.tab.className.replace(/(^| )cbi-tab( |$)/, " cbi-tab-disabled ");
1038                                 o2.container.style.display = 'none';
1039                         }
1040                         else {
1041                                 if(h) h.value = tab;
1042                                 o2.tab.className = o2.tab.className.replace(/(^| )cbi-tab-disabled( |$)/, " cbi-tab ");
1043                                 o2.container.style.display = 'block';
1044                         }
1045                 }
1046         }
1047         return false
1048 }
1049
1050 function cbi_t_update() {
1051         var hl_tabs = [ ];
1052         var updated = false;
1053
1054         for( var sid in cbi_t )
1055                 for( var tid in cbi_t[sid] )
1056                 {
1057                         var t = cbi_t[sid][tid].tab;
1058                         var c = cbi_t[sid][tid].container;
1059
1060                         if (!c.firstElementChild) {
1061                                 t.style.display = 'none';
1062                         }
1063                         else if (t.style.display == 'none') {
1064                                 t.style.display = '';
1065                                 t.className += ' cbi-tab-highlighted';
1066                                 hl_tabs.push(t);
1067                         }
1068
1069                         cbi_tag_last(c);
1070                         updated = true;
1071                 }
1072
1073         if (hl_tabs.length > 0)
1074                 window.setTimeout(function() {
1075                         for( var i = 0; i < hl_tabs.length; i++ )
1076                                 hl_tabs[i].className = hl_tabs[i].className.replace(/ cbi-tab-highlighted/g, '');
1077                 }, 750);
1078
1079         return updated;
1080 }
1081
1082
1083 function cbi_validate_form(form, errmsg)
1084 {
1085         /* if triggered by a section removal or addition, don't validate */
1086         if( form.cbi_state == 'add-section' || form.cbi_state == 'del-section' )
1087                 return true;
1088
1089         if( form.cbi_validators )
1090         {
1091                 for( var i = 0; i < form.cbi_validators.length; i++ )
1092                 {
1093                         var validator = form.cbi_validators[i];
1094                         if( !validator() && errmsg )
1095                         {
1096                                 alert(errmsg);
1097                                 return false;
1098                         }
1099                 }
1100         }
1101
1102         return true;
1103 }
1104
1105 function cbi_validate_reset(form)
1106 {
1107         window.setTimeout(
1108                 function() { cbi_validate_form(form, null) }, 100
1109         );
1110
1111         return true;
1112 }
1113
1114 function cbi_validate_compile(code)
1115 {
1116         var pos = 0;
1117         var esc = false;
1118         var depth = 0;
1119         var stack = [ ];
1120
1121         code += ',';
1122
1123         for (var i = 0; i < code.length; i++)
1124         {
1125                 if (esc)
1126                 {
1127                         esc = false;
1128                         continue;
1129                 }
1130
1131                 switch (code.charCodeAt(i))
1132                 {
1133                 case 92:
1134                         esc = true;
1135                         break;
1136
1137                 case 40:
1138                 case 44:
1139                         if (depth <= 0)
1140                         {
1141                                 if (pos < i)
1142                                 {
1143                                         var label = code.substring(pos, i);
1144                                                 label = label.replace(/\\(.)/g, '$1');
1145                                                 label = label.replace(/^[ \t]+/g, '');
1146                                                 label = label.replace(/[ \t]+$/g, '');
1147
1148                                         if (label && !isNaN(label))
1149                                         {
1150                                                 stack.push(parseFloat(label));
1151                                         }
1152                                         else if (label.match(/^(['"]).*\1$/))
1153                                         {
1154                                                 stack.push(label.replace(/^(['"])(.*)\1$/, '$2'));
1155                                         }
1156                                         else if (typeof cbi_validators[label] == 'function')
1157                                         {
1158                                                 stack.push(cbi_validators[label]);
1159                                                 stack.push(null);
1160                                         }
1161                                         else
1162                                         {
1163                                                 throw "Syntax error, unhandled token '"+label+"'";
1164                                         }
1165                                 }
1166                                 pos = i+1;
1167                         }
1168                         depth += (code.charCodeAt(i) == 40);
1169                         break;
1170
1171                 case 41:
1172                         if (--depth <= 0)
1173                         {
1174                                 if (typeof stack[stack.length-2] != 'function')
1175                                         throw "Syntax error, argument list follows non-function";
1176
1177                                 stack[stack.length-1] =
1178                                         arguments.callee(code.substring(pos, i));
1179
1180                                 pos = i+1;
1181                         }
1182                         break;
1183                 }
1184         }
1185
1186         return stack;
1187 }
1188
1189 function cbi_validate_field(cbid, optional, type)
1190 {
1191         var field = (typeof cbid == "string") ? document.getElementById(cbid) : cbid;
1192         var vstack; try { vstack = cbi_validate_compile(type); } catch(e) { };
1193
1194         if (field && vstack && typeof vstack[0] == "function")
1195         {
1196                 var validator = function()
1197                 {
1198                         // is not detached
1199                         if( field.form )
1200                         {
1201                                 field.className = field.className.replace(/ cbi-input-invalid/g, '');
1202
1203                                 // validate value
1204                                 var value = (field.options && field.options.selectedIndex > -1)
1205                                         ? field.options[field.options.selectedIndex].value : field.value;
1206
1207                                 if (!(((value.length == 0) && optional) || vstack[0].apply(value, vstack[1])))
1208                                 {
1209                                         // invalid
1210                                         field.className += ' cbi-input-invalid';
1211                                         return false;
1212                                 }
1213                         }
1214
1215                         return true;
1216                 };
1217
1218                 if( ! field.form.cbi_validators )
1219                         field.form.cbi_validators = [ ];
1220
1221                 field.form.cbi_validators.push(validator);
1222
1223                 cbi_bind(field, "blur",  validator);
1224                 cbi_bind(field, "keyup", validator);
1225
1226                 if (field.nodeName == 'SELECT')
1227                 {
1228                         cbi_bind(field, "change", validator);
1229                         cbi_bind(field, "click",  validator);
1230                 }
1231
1232                 field.setAttribute("cbi_validate", validator);
1233                 field.setAttribute("cbi_datatype", type);
1234                 field.setAttribute("cbi_optional", (!!optional).toString());
1235
1236                 validator();
1237
1238                 var fcbox = document.getElementById('cbi.combobox.' + field.id);
1239                 if (fcbox)
1240                         cbi_validate_field(fcbox, optional, type);
1241         }
1242 }
1243
1244 function cbi_row_swap(elem, up, store)
1245 {
1246         var tr = elem.parentNode;
1247
1248         while (tr && !tr.classList.contains('cbi-section-table-row'))
1249                 tr = tr.parentNode;
1250
1251         if (!tr)
1252                 return false;
1253
1254         if (up) {
1255                 var prev = tr.previousElementSibling;
1256
1257                 if (prev && prev.classList.contains('cbi-section-table-row'))
1258                         tr.parentNode.insertBefore(tr, prev);
1259                 else
1260                         return;
1261         }
1262         else {
1263                 var next = tr.nextElementSibling ? tr.nextElementSibling.nextElementSibling : null;
1264
1265                 if (next && next.classList.contains('cbi-section-table-row'))
1266                         tr.parentNode.insertBefore(tr, next);
1267                 else if (!next)
1268                         tr.parentNode.appendChild(tr);
1269                 else
1270                         return;
1271         }
1272
1273         var ids = [ ];
1274
1275         for (var i = 0, n = 0; i < tr.parentNode.childNodes.length; i++) {
1276                 var node = tr.parentNode.childNodes[i];
1277                 if (node.classList && node.classList.contains('cbi-section-table-row')) {
1278                         node.classList.remove('cbi-rowstyle-1');
1279                         node.classList.remove('cbi-rowstyle-2');
1280                         node.classList.add((n++ % 2) ? 'cbi-rowstyle-2' : 'cbi-rowstyle-1');
1281
1282                         if (/-([^\-]+)$/.test(node.id))
1283                                 ids.push(RegExp.$1);
1284                 }
1285         }
1286
1287         var input = document.getElementById(store);
1288         if (input)
1289                 input.value = ids.join(' ');
1290
1291         return false;
1292 }
1293
1294 function cbi_tag_last(container)
1295 {
1296         var last;
1297
1298         for (var i = 0; i < container.childNodes.length; i++)
1299         {
1300                 var c = container.childNodes[i];
1301                 if (c.nodeType == 1 && c.nodeName.toLowerCase() == 'div')
1302                 {
1303                         c.className = c.className.replace(/ cbi-value-last$/, '');
1304                         last = c;
1305                 }
1306         }
1307
1308         if (last)
1309         {
1310                 last.className += ' cbi-value-last';
1311         }
1312 }
1313
1314 String.prototype.format = function()
1315 {
1316         if (!RegExp)
1317                 return;
1318
1319         var html_esc = [/&/g, '&#38;', /"/g, '&#34;', /'/g, '&#39;', /</g, '&#60;', />/g, '&#62;'];
1320         var quot_esc = [/"/g, '&#34;', /'/g, '&#39;'];
1321
1322         function esc(s, r) {
1323                 if (typeof(s) !== 'string' && !(s instanceof String))
1324                         return '';
1325
1326                 for( var i = 0; i < r.length; i += 2 )
1327                         s = s.replace(r[i], r[i+1]);
1328                 return s;
1329         }
1330
1331         var str = this;
1332         var out = '';
1333         var re = /^(([^%]*)%('.|0|\x20)?(-)?(\d+)?(\.\d+)?(%|b|c|d|u|f|o|s|x|X|q|h|j|t|m))/;
1334         var a = b = [], numSubstitutions = 0, numMatches = 0;
1335
1336         while (a = re.exec(str))
1337         {
1338                 var m = a[1];
1339                 var leftpart = a[2], pPad = a[3], pJustify = a[4], pMinLength = a[5];
1340                 var pPrecision = a[6], pType = a[7];
1341
1342                 numMatches++;
1343
1344                 if (pType == '%')
1345                 {
1346                         subst = '%';
1347                 }
1348                 else
1349                 {
1350                         if (numSubstitutions < arguments.length)
1351                         {
1352                                 var param = arguments[numSubstitutions++];
1353
1354                                 var pad = '';
1355                                 if (pPad && pPad.substr(0,1) == "'")
1356                                         pad = leftpart.substr(1,1);
1357                                 else if (pPad)
1358                                         pad = pPad;
1359                                 else
1360                                         pad = ' ';
1361
1362                                 var justifyRight = true;
1363                                 if (pJustify && pJustify === "-")
1364                                         justifyRight = false;
1365
1366                                 var minLength = -1;
1367                                 if (pMinLength)
1368                                         minLength = +pMinLength;
1369
1370                                 var precision = -1;
1371                                 if (pPrecision && pType == 'f')
1372                                         precision = +pPrecision.substring(1);
1373
1374                                 var subst = param;
1375
1376                                 switch(pType)
1377                                 {
1378                                         case 'b':
1379                                                 subst = (+param || 0).toString(2);
1380                                                 break;
1381
1382                                         case 'c':
1383                                                 subst = String.fromCharCode(+param || 0);
1384                                                 break;
1385
1386                                         case 'd':
1387                                                 subst = ~~(+param || 0);
1388                                                 break;
1389
1390                                         case 'u':
1391                                                 subst = ~~Math.abs(+param || 0);
1392                                                 break;
1393
1394                                         case 'f':
1395                                                 subst = (precision > -1)
1396                                                         ? ((+param || 0.0)).toFixed(precision)
1397                                                         : (+param || 0.0);
1398                                                 break;
1399
1400                                         case 'o':
1401                                                 subst = (+param || 0).toString(8);
1402                                                 break;
1403
1404                                         case 's':
1405                                                 subst = param;
1406                                                 break;
1407
1408                                         case 'x':
1409                                                 subst = ('' + (+param || 0).toString(16)).toLowerCase();
1410                                                 break;
1411
1412                                         case 'X':
1413                                                 subst = ('' + (+param || 0).toString(16)).toUpperCase();
1414                                                 break;
1415
1416                                         case 'h':
1417                                                 subst = esc(param, html_esc);
1418                                                 break;
1419
1420                                         case 'q':
1421                                                 subst = esc(param, quot_esc);
1422                                                 break;
1423
1424                                         case 't':
1425                                                 var td = 0;
1426                                                 var th = 0;
1427                                                 var tm = 0;
1428                                                 var ts = (param || 0);
1429
1430                                                 if (ts > 60) {
1431                                                         tm = Math.floor(ts / 60);
1432                                                         ts = (ts % 60);
1433                                                 }
1434
1435                                                 if (tm > 60) {
1436                                                         th = Math.floor(tm / 60);
1437                                                         tm = (tm % 60);
1438                                                 }
1439
1440                                                 if (th > 24) {
1441                                                         td = Math.floor(th / 24);
1442                                                         th = (th % 24);
1443                                                 }
1444
1445                                                 subst = (td > 0)
1446                                                         ? String.format('%dd %dh %dm %ds', td, th, tm, ts)
1447                                                         : String.format('%dh %dm %ds', th, tm, ts);
1448
1449                                                 break;
1450
1451                                         case 'm':
1452                                                 var mf = pMinLength ? +pMinLength : 1000;
1453                                                 var pr = pPrecision ? ~~(10 * +('0' + pPrecision)) : 2;
1454
1455                                                 var i = 0;
1456                                                 var val = (+param || 0);
1457                                                 var units = [ ' ', ' K', ' M', ' G', ' T', ' P', ' E' ];
1458
1459                                                 for (i = 0; (i < units.length) && (val > mf); i++)
1460                                                         val /= mf;
1461
1462                                                 subst = (i ? val.toFixed(pr) : val) + units[i];
1463                                                 pMinLength = null;
1464                                                 break;
1465                                 }
1466                         }
1467                 }
1468
1469                 if (pMinLength) {
1470                         subst = subst.toString();
1471                         for (var i = subst.length; i < pMinLength; i++)
1472                                 if (pJustify == '-')
1473                                         subst = subst + ' ';
1474                                 else
1475                                         subst = pad + subst;
1476                 }
1477
1478                 out += leftpart + subst;
1479                 str = str.substr(m.length);
1480         }
1481
1482         return out + str;
1483 }
1484
1485 String.prototype.nobr = function()
1486 {
1487         return this.replace(/[\s\n]+/g, '&#160;');
1488 }
1489
1490 String.format = function()
1491 {
1492         var a = [ ];
1493         for (var i = 1; i < arguments.length; i++)
1494                 a.push(arguments[i]);
1495         return ''.format.apply(arguments[0], a);
1496 }
1497
1498 String.nobr = function()
1499 {
1500         var a = [ ];
1501         for (var i = 1; i < arguments.length; i++)
1502                 a.push(arguments[i]);
1503         return ''.nobr.apply(arguments[0], a);
1504 }
1505
1506
1507 var dummyElem, domParser;
1508
1509 function isElem(e)
1510 {
1511         return (typeof(e) === 'object' && e !== null && 'nodeType' in e);
1512 }
1513
1514 function toElem(s)
1515 {
1516         var elem;
1517
1518         try {
1519                 domParser = domParser || new DOMParser();
1520                 elem = domParser.parseFromString(s, 'text/html').body.firstChild;
1521         }
1522         catch(e) {}
1523
1524         if (!elem) {
1525                 try {
1526                         dummyElem = dummyElem || document.createElement('div');
1527                         dummyElem.innerHTML = s;
1528                         elem = dummyElem.firstChild;
1529                 }
1530                 catch (e) {}
1531         }
1532
1533         return elem || null;
1534 }
1535
1536 function E()
1537 {
1538         var html = arguments[0],
1539             attr = (arguments[1] instanceof Object && !Array.isArray(arguments[1])) ? arguments[1] : null,
1540             data = attr ? arguments[2] : arguments[1],
1541             elem;
1542
1543         if (isElem(html))
1544                 elem = html;
1545         else if (html.charCodeAt(0) === 60)
1546                 elem = toElem(html);
1547         else
1548                 elem = document.createElement(html);
1549
1550         if (!elem)
1551                 return null;
1552
1553         if (attr)
1554                 for (var key in attr)
1555                         if (attr.hasOwnProperty(key))
1556                                 elem.setAttribute(key, attr[key]);
1557
1558         if (typeof(data) === 'function')
1559                 data = data(elem);
1560
1561         if (isElem(data)) {
1562                 elem.appendChild(data);
1563         }
1564         else if (Array.isArray(data)) {
1565                 for (var i = 0; i < data.length; i++)
1566                         if (isElem(data[i]))
1567                                 elem.appendChild(data[i]);
1568                         else
1569                                 elem.appendChild(document.createTextNode('' + data[i]));
1570         }
1571         else if (data !== null && data !== undefined) {
1572                 elem.innerHTML = '' + data;
1573         }
1574
1575         return elem;
1576 }