jquery/jquery.js

   1 /*
   2  * jQuery
   3  *
   4  * Copyright (c) 2006 John Resig (jquery.com)
   5  * Licensed under the MIT License:
   6  *   http://www.opensource.org/licenses/mit-license.php
   7  *
   8  * $Date$
   9  * $Rev$
  10  */
  11
  12 // Global undefined variable
  13 window.undefined = window.undefined;
  14
  15 function jQuery(a,c) {
  16         this.cur = $.Select(
  17                 a || $.context || document,
  18                 c && c.$jquery && c.get(0) || c
  19         );
  20 }
  21
  22 if ( window.$ == undefined )
  23         var $ = function(a,c) {
  24                 return new jQuery(a,c);
  25         };
  26
  27 jQuery.prototype = $.fn = {
  28         $jquery: "$Rev$",
  29
  30         // The only two getters
  31         size: function() {
  32                 return this.get().length;
  33         },
  34         get: function(i) {
  35                 return i == undefined ? this.cur : this.cur[i];
  36         },
  37
  38         each: function(f) {
  39                 for ( var i = 0; i < this.size(); i++ )
  40                         f.apply( this.get(i), [i] );
  41                 return this;
  42         },
  43         set: function(a,b) {
  44                 return this.each(function(){
  45                         if ( b == undefined )
  46                                 for ( var j in a )
  47                                         $.attr(this,j,a[j]);
  48                         else
  49                                 $.attr(this,a,b);
  50                 });
  51         },
  52         html: function(h) {
  53                 return h == undefined && this.size() ?
  54                         this.get(0).innerHTML : this.set( "innerHTML", h );
  55         },
  56         val: function(h) {
  57                 return h == undefined && this.size() ?
  58                         this.get(0).value : this.set( "value", h );
  59         },
  60         text: function(e) {
  61                 e = e || this.get();
  62                 var t = "";
  63                 for ( var j = 0; j < e.length; j++ )
  64                         for ( var i = 0; i < e[j].childNodes.length; i++ )
  65                                 t += e[j].childNodes[i].nodeType != 1 ?
  66                                         e[j].childNodes[i].nodeValue :
  67                                         $.fn.text(e[j].childNodes[i].childNodes);
  68                 return t;
  69         },
  70
  71         css: function(a,b) {
  72                 return  a.constructor != String || b ?
  73                         this.each(function(){
  74                                 if ( !b )
  75                                         for ( var j in a )
  76                                                 $.attr(this.style,j,a[j]);
  77                                 else
  78                                         $.attr(this.style,a,b);
  79                         }) : $.css( this.get(0), a );
  80         },
  81         toggle: function() {
  82                 return this.each(function(){
  83                         var d = $.css(this,"display");
  84                         if ( d == "none" || d === "" )
  85                                 $(this).show();
  86                         else
  87                                 $(this).hide();
  88                 });
  89         },
  90         show: function() {
  91                 return this.each(function(){
  92                         this.style.display = this.oldblock ? this.oldblock : "";
  93                         if ( $.css(this,"display") == "none" )
  94                                 this.style.display = "block";
  95                 });
  96         },
  97         hide: function() {
  98                 return this.each(function(){
  99                         this.oldblock = $.css(this,"display");
 100                         if ( this.oldblock == "none" )
 101                                 this.oldblock = "block";
 102                         this.style.display = "none";
 103                 });
 104         },
 105         addClass: function(c) {
 106                 return this.each(function(){
 107                         $.class.add(this,c);
 108                 });
 109         },
 110         removeClass: function(c) {
 111                 return this.each(function(){
 112                         $.class.remove(this,c);
 113                 });
 114         },
 115         // TODO: Optomize
 116         toggleClass: function(c) {
 117                 return this.each(function(){
 118                         if ($.hasWord(this,c))
 119                                 $.class.remove(this,c);
 120                         else
 121                                 $.class.add(this,c);
 122                 });
 123         },
 124         remove: function() {
 125                 this.each(function(){this.parentNode.removeChild( this );});
 126                 this.cur = [];
 127                 return this;
 128         },
 129
 130         wrap: function() {
 131                 var a = $.clean(arguments);
 132                 return this.each(function(){
 133                         var b = a[0].cloneNode(true);
 134                         this.parentNode.insertBefore( b, this );
 135                         while ( b.firstChild )
 136                                 b = b.firstChild;
 137                         b.appendChild( this );
 138                 });
 139         },
 140
 141         append: function() {
 142                 var clone = this.size() > 1;
 143                 var a = $.clean(arguments);
 144                 return this.domManip(function(){
 145                         for ( var i = 0; i < a.length; i++ )
 146                                 this.appendChild( clone ? a[i].cloneNode(true) : a[i] );
 147                 });
 148         },
 149
 150         appendTo: function() {
 151                 var a = arguments;
 152                 return this.each(function(){
 153                         for ( var i = 0; i < a.length; i++ )
 154                                 $(a[i]).append( this );
 155                 });
 156         },
 157
 158         prepend: function() {
 159                 var clone = this.size() > 1;
 160                 var a = $.clean(arguments);
 161                 return this.domManip(function(){
 162                         for ( var i = a.length - 1; i >= 0; i-- )
 163                                 this.insertBefore( clone ? a[i].cloneNode(true) : a[i], this.firstChild );
 164                 });
 165         },
 166
 167         before: function() {
 168                 var clone = this.size() > 1;
 169                 var a = $.clean(arguments);
 170                 return this.each(function(){
 171                         for ( var i = 0; i < a.length; i++ )
 172                                 this.parentNode.insertBefore( clone ? a[i].cloneNode(true) : a[i], this );
 173                 });
 174         },
 175
 176         after: function() {
 177                 var clone = this.size() > 1;
 178                 var a = $.clean(arguments);
 179                 return this.each(function(){
 180                         for ( var i = a.length - 1; i >= 0; i-- )
 181                                 this.parentNode.insertBefore( clone ? a[i].cloneNode(true) : a[i], this.nextSibling );
 182                 });
 183         },
 184
 185         empty: function() {
 186                 return this.each(function(){
 187                         while ( this.firstChild )
 188                                 this.removeChild( this.firstChild );
 189                 });
 190         },
 191
 192         bind: function(t,f) {
 193                 return this.each(function(){$.event.add(this,t,f);});
 194         },
 195         unbind: function(t,f) {
 196                 return this.each(function(){$.event.remove(this,t,f);});
 197         },
 198         trigger: function(t) {
 199                 return this.each(function(){$.event.trigger(this,t);});
 200         },
 201
 202         find: function(t) {
 203                 var old = [], ret = [];
 204                 this.each(function(){
 205                         old[old.length] = this;
 206                         ret = $.merge( ret, $.Select(t,this) );
 207                 });
 208                 this.old = old;
 209                 this.cur = ret;
 210                 return this;
 211         },
 212         end: function() {
 213                 this.cur = this.old;
 214                 return this;
 215         },
 216
 217         parent: function(a) {
 218                 this.cur = $.map(this.cur,"d.parentNode");
 219                 if ( a ) this.cur = $.filter(a,this.cur).r;
 220                 return this;
 221         },
 222
 223         parents: function(a) {
 224                 this.cur = $.map(this.cur,$.parents);
 225                 if ( a ) this.cur = $.filter(a,this.cur).r;
 226                 return this;
 227         },
 228
 229         siblings: function(a) {
 230                 // Incorrect, need to exclude current element
 231                 this.cur = $.map(this.cur,$.sibling);
 232                 if ( a ) this.cur = $.filter(a,this.cur).r;
 233                 return this;
 234         },
 235
 236         filter: function(t) {
 237                 this.cur = $.filter(t,this.cur).r;
 238                 return this;
 239         },
 240         not: function(t) {
 241                 this.cur = t.constructor == String ?
 242                         $.filter(t,this.cur,false).r :
 243                         $.grep(this.cur,function(a){ return a != t; });
 244                 return this;
 245         },
 246         add: function(t) {
 247                 this.cur = $.merge( this.cur, t.constructor == String ?
 248                         $.Select(t) : t.constructor == Array ? t : [t] );
 249                 return this;
 250         },
 251         is: function(t) {
 252                 return $.filter(t,this.cur).r.length > 0;
 253         },
 254
 255         /**
 256          * A wrapper function for each() to be used by append and prepend.
 257          * Handles cases where you're trying to modify the inner contents of
 258          * a table, when you actually need to work with the tbody.
 259          */
 260         domManip: function(fn){
 261                 return this.each(function(){
 262                         var obj = this;
 263
 264                         if ( this.nodeName == "TABLE" ) {
 265                                 var tbody = this.getElementsByTagName("tbody");
 266
 267                                 if ( !tbody.length ) {
 268                                         obj = document.createElement("tbody");
 269                                         this.appendChild( obj );
 270                                 } else
 271                                         obj = tbody[0];
 272                         }
 273
 274                         fn.apply( obj );
 275                 });
 276         }
 277 };
 278
 279 $.class = {
 280         add: function(o,c){
 281                 if ($.hasWord(o,c)) return;
 282                 o.className += ( o.className.length > 0 ? " " : "" ) + c;
 283         },
 284         remove: function(o,c){
 285                 o.className = !c ? "" :
 286                         o.className.replace(
 287                                 new RegExp("(^|\\s*\\b[^-])"+c+"($|\\b(?=[^-]))", "g"), "");
 288         }
 289 };
 290
 291 (function(){
 292         var b = navigator.userAgent.toLowerCase();
 293
 294         // Figure out what browser is being used
 295         $.browser =
 296                 ( /webkit/.test(b) && "safari" ) ||
 297                 ( /opera/.test(b) && "opera" ) ||
 298                 ( /msie/.test(b) && "msie" ) ||
 299                 ( !/compatible/.test(b) && "mozilla" ) ||
 300                 "other";
 301
 302         // Check to see if the W3C box model is being used
 303         $.boxModel = ( $.browser != "msie" || document.compatMode == "CSS1Compat" );
 304 })();
 305
 306 $.css = function(e,p) {
 307         // Adapted from Prototype 1.4.0
 308         if ( p == "height" || p == "width" ) {
 309
 310                 // Handle extra width/height provided by the W3C box model
 311                 var ph = (!$.boxModel ? 0 :
 312                         $.css(e,"paddingTop") + $.css(e,"paddingBottom") +
 313                         $.css(e,"borderTopWidth") + $.css(e,"borderBottomWidth")) || 0;
 314
 315                 var pw = (!$.boxModel ? 0 :
 316                         $.css(e,"paddingLeft") + $.css(e,"paddingRight") +
 317                         $.css(e,"borderLeftWidth") + $.css(e,"borderRightWidth")) || 0;
 318
 319                 var oHeight, oWidth;
 320
 321                 if ($.css(e,"display") != 'none') {
 322                         oHeight = e.offsetHeight || parseInt(e.style.height) || 0;
 323                         oWidth = e.offsetWidth || parseInt(e.style.width) || 0;
 324                 } else {
 325                         var els = e.style;
 326                         var ov = els.visibility;
 327                         var op = els.position;
 328                         var od = els.display;
 329                         els.visibility = "hidden";
 330                         els.position = "absolute";
 331                         els.display = "";
 332                         oHeight = e.clientHeight || parseInt(e.style.height);
 333                         oWidth = e.clientWidth || parseInt(e.style.width);
 334                         els.display = od;
 335                         els.position = op;
 336                         els.visibility = ov;
 337                 }
 338
 339                 return p == "height" ?
 340                         (oHeight - ph < 0 ? 0 : oHeight - ph) :
 341                         (oWidth - pw < 0 ? 0 : oWidth - pw);
 342         }
 343
 344         var r;
 345
 346         if (e.style[p])
 347                 r = e.style[p];
 348         else if (e.currentStyle)
 349                 r = e.currentStyle[p];
 350         else if (document.defaultView && document.defaultView.getComputedStyle) {
 351                 p = p.replace(/([A-Z])/g,"-$1").toLowerCase();
 352                 var s = document.defaultView.getComputedStyle(e,"");
 353                 r = s ? s.getPropertyValue(p) : null;
 354         }
 355
 356         return /top|right|left|bottom/i.test(p) ? parseFloat( r ) : r;
 357 };
 358
 359 $.clean = function(a) {
 360         var r = [];
 361         for ( var i = 0; i < a.length; i++ ) {
 362                 if ( a[i].constructor == String ) {
 363
 364                         if ( !a[i].indexOf("<tr") ) {
 365                                 var tr = true;
 366                                 a[i] = "<table>" + a[i] + "</table>";
 367                         } else if ( !a[i].indexOf("<td") || !a[i].indexOf("<th") ) {
 368                                 var td = true;
 369                                 a[i] = "<table><tbody><tr>" + a[i] + "</tr></tbody></table>";
 370                         }
 371
 372                         var div = document.createElement("div");
 373                         div.innerHTML = a[i];
 374
 375                         if ( tr || td ) {
 376                                 div = div.firstChild.firstChild;
 377                                 if ( td ) div = div.firstChild;
 378                         }
 379
 380                         for ( var j = 0; j < div.childNodes.length; j++ )
 381                                 r[r.length] = div.childNodes[j];
 382                 } else if ( a[i].length && !a[i].nodeType )
 383                         for ( var k = 0; k < a[i].length; k++ )
 384                                 r[r.length] = a[i][k];
 385                 else if ( a[i] !== null )
 386                         r[r.length] =
 387                                 a[i].nodeType ? a[i] : document.createTextNode(a[i].toString());
 388         }
 389         return r;
 390 };
 391
 392 $.g = {
 393         "": "m[2]== '*'||a.nodeName.toUpperCase()==m[2].toUpperCase()",
 394         "#": "a.getAttribute('id')&&a.getAttribute('id')==m[2]",
 395         ":": {
 396                 lt: "i<m[3]-0",
 397                 gt: "i>m[3]-0",
 398                 nth: "m[3]-0==i",
 399                 eq: "m[3]-0==i",
 400                 first: "i==0",
 401                 last: "i==r.length-1",
 402                 even: "i%2==0",
 403                 odd: "i%2==1",
 404                 "first-child": "$.sibling(a,0).cur",
 405                 "nth-child": "(m[3]=='even'?$.sibling(a,m[3]).n%2==0:(m[3]=='odd'?$.sibling(a,m[3]).n%2==1:$.sibling(a,m[3]).cur))",
 406                 "last-child": "$.sibling(a,0,true).cur",
 407                 "nth-last-child": "$.sibling(a,m[3],true).cur",
 408                 "first-of-type": "$.ofType(a,0)",
 409                 "nth-of-type": "$.ofType(a,m[3])",
 410                 "last-of-type": "$.ofType(a,0,true)",
 411                 "nth-last-of-type": "$.ofType(a,m[3],true)",
 412                 "only-of-type": "$.ofType(a)==1",
 413                 "only-child": "$.sibling(a).length==1",
 414                 parent: "a.childNodes.length",
 415                 empty: "!a.childNodes.length",
 416                 root: "a==(a.ownerDocument||document).documentElement",
 417                 contains: "(a.innerText||a.innerHTML).indexOf(m[3])!=-1",
 418                 visible: "(!a.type||a.type!='hidden')&&($.css(a,'display')!= 'none'&&$.css(a,'visibility')!= 'hidden')",
 419                 hidden: "(a.type&&a.type == 'hidden')||$.css(a,'display')=='none'||$.css(a,'visibility')== 'hidden'",
 420                 enabled: "a.disabled==false",
 421                 disabled: "a.disabled",
 422                 checked: "a.checked"
 423         },
 424         ".": "$.hasWord(a,m[2])",
 425         "@": {
 426                 "=": "$.attr(a,m[3])==m[4]",
 427                 "!=": "$.attr(a,m[3])!=m[4]",
 428                 "~=": "$.hasWord($.attr(a,m[3]),m[4])",
 429                 "|=": "!$.attr(a,m[3]).indexOf(m[4])",
 430                 "^=": "!$.attr(a,m[3]).indexOf(m[4])",
 431                 "$=": "$.attr(a,m[3]).substr( $.attr(a,m[3]).length - m[4].length,m[4].length )==m[4]",
 432                 "*=": "$.attr(a,m[3]).indexOf(m[4])>=0",
 433                 "": "m[3]=='*'?a.attributes.length>0:$.attr(a,m[3])"
 434         },
 435         "[": "$.Select(m[2],a).length"
 436 };
 437
 438 $.token = [
 439         "\\.\\.|/\\.\\.", "a.parentNode",
 440         ">|/", "$.sibling(a.firstChild)",
 441         "\\+", "$.sibling(a).next",
 442         "~", function(a){
 443                 var r = [];
 444                 var s = $.sibling(a);
 445                 if ( s.n > 0 )
 446                         for ( var i = s.n; i < s.length; i++ )
 447                                 r[r.length] = s[i];
 448                 return r;
 449         }
 450 ];
 451
 452 $.Select = function( t, context ) {
 453         context = context || $.context || document;
 454         if ( t.constructor != String ) return [t];
 455
 456         if ( !t.indexOf("//") ) {
 457                 context = context.documentElement;
 458                 t = t.substr(2,t.length);
 459         } else if ( !t.indexOf("/") ) {
 460                 context = context.documentElement;
 461                 t = t.substr(1,t.length);
 462                 // FIX Assume the root element is right :(
 463                 if ( t.indexOf("/") >= 1 )
 464                         t = t.substr(t.indexOf("/"),t.length);
 465         }
 466
 467         var ret = [context];
 468         var done = [];
 469         var last = null;
 470
 471         while ( t.length > 0 && last != t ) {
 472     var r = [];
 473                 last = t;
 474
 475     t = $.cleanSpaces(t).replace( /^\/\//i, "" );
 476
 477                 var foundToken = false;
 478
 479                 for ( var i = 0; i < $.token.length; i += 2 ) {
 480                         var re = new RegExp("^(" + $.token[i] + ")");
 481                         var m = re.exec(t);
 482
 483                         if ( m ) {
 484                                 r = ret = $.map( ret, $.token[i+1] );
 485                                 t = $.cleanSpaces( t.replace( re, "" ) );
 486                                 foundToken = true;
 487                         }
 488                 }
 489
 490                 if ( !foundToken ) {
 491
 492                         if ( !t.indexOf(",") || !t.indexOf("|") ) {
 493                                 if ( ret[0] == context ) ret.shift();
 494                                 done = $.merge( done, ret );
 495                                 r = ret = [context];
 496                                 t = " " + t.substr(1,t.length);
 497                         } else {
 498                                 var re2 = /^([#.]?)([a-z0-9\\*_-]*)/i;
 499                                 var m = re2.exec(t);
 500
 501                                 if ( m[1] == "#" ) {
 502                                         // Ummm, should make this work in all XML docs
 503                                         var oid = document.getElementById(m[2]);
 504                                         r = ret = oid ? [oid] : [];
 505                                         t = t.replace( re2, "" );
 506                                 } else {
 507                                         if ( !m[2] || m[1] == "." ) m[2] = "*";
 508
 509                                         for ( var i = 0; i < ret.length; i++ )
 510                                                 r = $.merge( r, $.tag(ret[i],m[2]) );
 511                                 }
 512                         }
 513
 514                 }
 515
 516                 if ( t ) {
 517                         var val = $.filter(t,r);
 518                         ret = r = val.r;
 519                         t = $.cleanSpaces(val.t);
 520                 }
 521         }
 522
 523         if ( ret && ret[0] == context ) ret.shift();
 524         done = $.merge( done, ret );
 525
 526         return done;
 527 };
 528
 529 $.tag = function(a,b){
 530         return a && a.getElementsByTagName != undefined ?
 531                 a.getElementsByTagName( b ) : [];
 532 };
 533
 534 $.attr = function(o,a,v){
 535         if ( a && a.constructor == String ) {
 536                 var fix = {
 537                         "for": "htmlFor",
 538                         "class": "className",
 539                         "float": "cssFloat"
 540                 };
 541                 a = (fix[a] && fix[a].replace && fix[a]) || a;
 542                 var r = /-([a-z])/ig;
 543                 a = a.replace(r,function(z,b){return b.toUpperCase();});
 544                 if ( v != undefined ) {
 545                         o[a] = v;
 546                         if ( o.setAttribute && a != "disabled" )
 547                                 o.setAttribute(a,v);
 548                 }
 549                 return o[a] || o.getAttribute(a) || "";
 550         } else
 551                 return "";
 552 };
 553
 554 $.filter = function(t,r,not) {
 555         var g = $.grep;
 556         if ( not === false )
 557                 g = function(a,f) {return $.grep(a,f,true);};
 558
 559         while ( t && t.match(/^[:\\.#\\[a-zA-Z\\*]/) ) {
 560                 var re = /^\[ *@([a-z0-9*()_-]+) *([~!|*$^=]*) *'?"?([^'"]*)'?"? *\]/i;
 561                 var m = re.exec(t);
 562
 563                 if ( m )
 564                         m = ["", "@", m[2], m[1], m[3]];
 565                 else {
 566                         re = /^(\[) *([^\]]*) *\]/i;
 567                         m = re.exec(t);
 568
 569                         if ( !m ) {
 570                                 re = /^(:)([a-z0-9*_-]*)\( *["']?([^ \)'"]*)['"]? *\)/i;
 571                                 m = re.exec(t);
 572
 573                                 if ( !m ) {
 574                                         re = /^([:\.#]*)([a-z0-9*_-]*)/i;
 575                                         m = re.exec(t);
 576                                 }
 577                         }
 578                 }
 579                 t = t.replace( re, "" );
 580
 581                 if ( m[1] == ":" && m[2] == "not" )
 582                         r = $.filter(m[3],r,false).r;
 583                 else {
 584                         var f = null;
 585
 586                         if ( $.g[m[1]].constructor == String )
 587                                 f = $.g[m[1]];
 588                         else if ( $.g[m[1]][m[2]] )
 589                                 f = $.g[m[1]][m[2]];
 590
 591                         if ( f ) {
 592                                 eval("f = function(a,i){return " + f + "}");
 593                                 r = g( r, f );
 594                         }
 595                 }
 596         }
 597
 598         return { r: r, t: t };
 599 };
 600
 601 $.parents = function(a){
 602         var b = [];
 603         var c = a.parentNode;
 604         while ( c && c != document ) {
 605                 b[b.length] = c;
 606                 c = c.parentNode;
 607         }
 608         return b;
 609 };
 610
 611 $.cleanSpaces = function(t){
 612         return t.replace(/^\s+|\s+$/g, "");
 613 };
 614
 615 $.ofType = function(a,n,e) {
 616         var t = $.grep($.sibling(a),function(b){ return b.nodeName == a.nodeName; });
 617         if ( e ) n = t.length - n - 1;
 618         return n != undefined ? t[n] == a : t.length;
 619 };
 620
 621 $.sibling = function(a,n,e) {
 622         var type = [];
 623         var tmp = a.parentNode.childNodes;
 624         for ( var i = 0; i < tmp.length; i++ ) {
 625                 if ( tmp[i].nodeType == 1 )
 626                         type[type.length] = tmp[i];
 627                 if ( tmp[i] == a )
 628                         type.n = type.length - 1;
 629         }
 630         if ( e ) n = type.length - n - 1;
 631         type.cur = ( type[n] == a );
 632         type.prev = ( type.n > 0 ? type[type.n - 1] : null );
 633         type.next = ( type.n < type.length - 1 ? type[type.n + 1] : null );
 634         return type;
 635 };
 636
 637 $.hasWord = function(e,a) {
 638         if ( e == undefined ) return;
 639         if ( e.className ) e = e.className;
 640         return new RegExp("(^|\\s)" + a + "(\\s|$)").test(e);
 641 };
 642
 643 $.getAll = function(o,r) {
 644         r = r || [];
 645         var s = o.childNodes;
 646         for ( var i = 0; i < s.length; i++ )
 647                 if ( s[i].nodeType == 1 ) {
 648                         r[r.length] = s[i];
 649                         $.getAll( s[i], r );
 650                 }
 651         return r;
 652 };
 653
 654 $.merge = function(a,b) {
 655         var d = [];
 656         for ( var k = 0; k < b.length; k++ ) d[k] = b[k];
 657
 658         for ( var i = 0; i < a.length; i++ ) {
 659                 var c = true;
 660                 for ( var j = 0; j < b.length; j++ )
 661                         if ( a[i] == b[j] )
 662                                 c = false;
 663                 if ( c ) d[d.length] = a[i];
 664         }
 665
 666         return d;
 667 };
 668
 669 $.grep = function(a,f,s) {
 670         if ( f.constructor == String )
 671                 f = new Function("a","i","return " + f);
 672         var r = [];
 673         if ( a != undefined )
 674                 for ( var i = 0; i < a.length; i++ )
 675                         if ( (!s && f(a[i],i)) || (s && !f(a[i],i)) )
 676                                 r[r.length] = a[i];
 677         return r;
 678 };
 679
 680 $.map = function(a,f) {
 681         if ( f.constructor == String )
 682                 f = new Function("a","return " + f);
 683
 684         var r = [];
 685         for ( var i = 0; i < a.length; i++ ) {
 686                 var t = f(a[i],i);
 687                 if ( t !== null ) {
 688                         if ( t.constructor != Array ) t = [t];
 689                         r = $.merge( t, r );
 690                 }
 691         }
 692         return r;
 693 };
 694
 695 $.event = {
 696
 697         // Bind an event to an element
 698         // Original by Dean Edwards
 699         add: function(element, type, handler) {
 700                 // For whatever reason, IE has trouble passing the window object
 701                 // around, causing it to be cloned in the process
 702                 if ( $.browser == "msie" && element.setInterval != undefined )
 703                         element = window;
 704
 705                 if (!handler.guid) handler.guid = $.event.guid++;
 706                 if (!element.events) element.events = {};
 707                 var handlers = element.events[type];
 708                 if (!handlers) {
 709                         handlers = element.events[type] = {};
 710                         if (element["on" + type])
 711                                 handlers[0] = element["on" + type];
 712                 }
 713                 handlers[handler.guid] = handler;
 714                 element["on" + type] = $.event.handle;
 715         },
 716
 717         guid: 1,
 718
 719         // Detach an event or set of events from an element
 720         remove: function(element, type, handler) {
 721                 if (element.events)
 722                         if (type && element.events[type])
 723                                 if ( handler )
 724                                         delete element.events[type][handler.guid];
 725                                 else
 726                                         for ( var i in element.events[type] )
 727                                                 delete element.events[type][i];
 728                         else
 729                                 for ( var j in element.events )
 730                                         $.event.remove( element, j );
 731         },
 732
 733         trigger: function(element,type,data) {
 734                 data = data || [ $.event.fix({ type: type }) ];
 735                 if ( element && element["on" + type] )
 736                         element["on" + type].apply( element, data );
 737         },
 738
 739         handle: function(event) {
 740                 if ( !event && !window.event ) return;
 741
 742                 var returnValue = true, handlers = [];
 743                 event = event || $.event.fix(window.event);
 744
 745                 for ( var j in this.events[event.type] )
 746                         handlers[handlers.length] = this.events[event.type][j];
 747
 748                 for ( var i = 0; i < handlers.length; i++ ) {
 749                         if ( handlers[i].constructor == Function ) {
 750                                 this.handleEvent = handlers[i];
 751                                 if (this.handleEvent(event) === false) {
 752                                         event.preventDefault();
 753                                         event.stopPropagation();
 754                                         returnValue = false;
 755                                 }
 756                         }
 757                 }
 758                 return returnValue;
 759         },
 760
 761         fix: function(event) {
 762                 event.preventDefault = function() {
 763                         this.returnValue = false;
 764                 };
 765
 766                 event.stopPropagation = function() {
 767                         this.cancelBubble = true;
 768                 };
 769
 770                 return event;
 771         }
 772
 773 }