/**
 * Written by Neil Crosby. 
 * http://www.workingwith.me.uk/
 *
 * Use this wherever you want, but please keep this comment at the top of this file.
 *
 * Copyright (c) 2006 Neil Crosby
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy 
 * of this software and associated documentation files (the "Software"), to deal 
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
 * copies of the Software, and to permit persons to whom the Software is 
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in 
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
 * SOFTWARE.
 **/
var css={getElementsByClass:function(node,searchClass,tag){var classElements=new Array();var els=node.getElementsByTagName(tag);var elsLen=els.length;var pattern=new RegExp("(^|\\s)"+searchClass+"(\\s|$)");for(var i=0,j=0;i<elsLen;i++){if(this.elementHasClass(els[i],searchClass)){classElements[j]=els[i];j++;}}
return classElements;},privateGetClassArray:function(el){return el.className.split(' ');},privateCreateClassString:function(classArray){return classArray.join(' ');},elementHasClass:function(el,classString){if(!el){return false;}
var regex=new RegExp('\\b'+classString+'\\b');if(el.className.match(regex)){return true;}
return false;},addClassToId:function(idString,classString){this.addClassToElement(document.getElementById(idString),classString);},addClassToElement:function(el,classString){var classArray=this.privateGetClassArray(el);if(this.elementHasClass(el,classString)){return;}
classArray.push(classString);el.className=this.privateCreateClassString(classArray);},removeClassFromId:function(idString,classString){this.removeClassFromElement(document.getElementById(idString),classString);},removeClassFromElement:function(el,classString){var classArray=this.privateGetClassArray(el);for(x in classArray){if(classString==classArray[x]){classArray[x]='';break;}}
el.className=this.privateCreateClassString(classArray);}}