/*
name			: Class Behaviour
update			: 20051129
author			: Xander Bindt, Frank van Rooijen, Maurice van Creij
dependencies		: lib_classbehaviour.js
info				: http://www.woollymittens.nl/
*/

	// MAIN
	// main class-behaviour object
	function ClassBehaviour(){
		/* properties */
			this.handlers			=	new Array();
		/* methods */
			// return a parameter from the url's query strings
			this.getQueryParameter 	= 	function(paramName, defaultValue){
											// split the query string at the parameter name
											var queryParameters = document.location.search.split(paramName+"=");
											// split the parameter value from the rest of the string
											var queryParameter = (queryParameters.length>1) ? queryParameters[1].split("&")[0] : null ;
											// return the value
											return (queryParameter!=null) ? queryParameter : defaultValue ;
										}
			// returns a string of parameters found in the classname which can be [eval]uated
			this.getClassParameter	=	function(targetNode, paramName, defaultValue){
											// get the class parameter from the classname
											var classParameter = targetNode.className;
											// split the classname between the parameter name
											classParameter = classParameter.split(paramName + '_');
											// split the second piece between spaces and take the first part,  if there are two pieces
											classParameter = (classParameter.length>1) ? classParameter[1].split(' ')[0] : null ;
											// return the value
											return (classParameter!=null) ? classParameter : defaultValue ;
										}
			// returns the visible display state needed for this element
			this.getVisibleState	=	function(node){
											// what kind of node is this
											switch(node.nodeName.toLowerCase()){
												case 'table' : visibleState='table' ; break;
												case 'thead' : visibleState='table-header-group' ; break;
												case 'tfoot' : visibleState='table-footer-group' ; break;
												case 'tbody' : visibleState='table-row-group' ; break;
												case 'tr' : visibleState='table-row' ; break;
												case 'td' : visibleState='table-cell' ; break;
												case 'th' : visibleState='table-cell' ; break;
												default : visibleState='block';
											}
											// apply the state
											return (document.all && navigator.userAgent.indexOf('Opera')<0) ? 'block' : visibleState;
										}
			// get the previous node without worrying about text nodes
			this.nextNode			=	function(node){
											// look for the next html node
											do {
												node = node.nextSibling;
											} while(node.nodeName.indexOf('#text')>-1);
											// return it
											return node;
										}
			// get the next node without worrying about text nodes
			this.previousNode		=	function(node){
											// look for the previous html node
											do {
												node = node.previousSibling;
											} while(node.nodeName.indexOf('#text')>-1);
											// return it
											return node;
										}
			// parse the document for classnames
			this.parseDocument		=	function(){
											// get all document nodes
											var allNodes = (document.all) ? document.all : document.getElementsByTagName("*");
											// for all tags
											for(var a=0; a<allNodes.length; a++){
												// if the item has a className
												if(allNodes[a].className){
													// get the classname
													nodeClass = allNodes[a].className;
													// for all behaviours
													for(var b=0; b<this.handlers.length; b++){
														// if the behaviour's name exists in the class name, apply it's events
														if(nodeClass.indexOf(this.handlers[b].name)>-1) this.handlers[b].start(allNodes[a]);
													}
												}
											}
										}
	}
	// create the main class-behaviour object
	var classBehaviour = new ClassBehaviour;
	
	// BEHAVIOURS
	// replace in class
		// define this class behaviour
		function ClassMouseHover(){
			/* properties */
			this.name 		= 	'classMouseHover';
			/* methods */
			this.start		=	function(node){
									node.onmouseover = this.addHover;
									node.onmouseout = this.remHover;
								}
			this.hasNoStateClass 	= 	function(objNode){
											return (objNode.className.indexOf('link')<0 && objNode.className.indexOf('hover')<0 && objNode.className.indexOf('active')<0);
										}
			/* events */
			this.addHover 	= 	function(that){
									var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
									var cmh = classBehaviour.classMouseHover;
									// replace link by hover
									objNode.className = (cmh.hasNoStateClass(objNode)) ? 'hover ' + objNode.className : objNode.className.replace('link','hover') ;
								}
			this.remHover 	= 	function(that){
									var objNode = (typeof(this.nodeName)=='undefined') ? that : this ;
									var cmh = classBehaviour.classMouseHover;
									// replace hover by link
									objNode.className = (cmh.hasNoStateClass(objNode)) ? 'link ' + objNode.className : objNode.className.replace('hover','link') ;
								}
		}
		// add this function to the classbehaviour object
		classBehaviour.classMouseHover = new ClassMouseHover;
		classBehaviour.handlers[classBehaviour.handlers.length] = classBehaviour.classMouseHover;
		
	// make all sub elements fake the :hover attribute with .hover
		// define this class behaviour
		function PseudoHover(){
			/* properties */
			this.name 		= 	'pseudoHover';
			/* methods */
			this.start		=	function(node){
									// get all elements
									allNodes = node.getElementsByTagName('LI');
									// for all elements
									for(var a=0; a<allNodes.length; a++){
										// add the hover event
										classBehaviour.classMouseHover.start(allNodes[a]);
									}
								}
		}
		// add this function to the classbehaviour object
		classBehaviour.pseudoHover = new PseudoHover;
		classBehaviour.handlers[classBehaviour.handlers.length] = classBehaviour.pseudoHover;

	// STARTUP-SEQUENCE
	// start the parsing of classes
	classBehaviour.parseDocument();