// Collapse javascript 

collapse={
	triggerElements:'div', 	// elements that trigger the effect
	parentElementId:null,	// ID of the parent element (keep null if none)
	uniqueCollapse:false,	// is set to true only one element can be open at a time
	trigger:'trigger',
	triggeropen:'expanded',
	hideClass:'collapsehide',
	showClass:'collapseshow',

	init:function(e){
		var temp;
		if(!document.getElementById || !document.createTextNode) { return; }
		if(!collapse.parentElementId){
			temp=document.getElementsByTagName(collapse.triggerElements);
		} else if(document.getElementById(collapse.parentElementId)){
			temp=document.getElementById(collapse.parentElementId).getElementsByTagName(collapse.triggerElements);
		}else{
			return;
		}
		collapse.tempLink=document.createElement('a');
		collapse.tempLink.setAttribute('href','#');
		for(var i=0;i<temp.length;i++){
			if(collapse.cssjs('check',temp[i],collapse.trigger) || collapse.cssjs('check',temp[i],collapse.triggeropen)){
				collapse.makeTrigger(temp[i],e);
			}
		}
	},
	makeTrigger:function(o,e){
		var tl=collapse.tempLink.cloneNode(true);
		var tohide=o.nextSibling;
		while(tohide.nodeType!=1)
		{
			tohide=tohide.nextSibling;
		}
		o.tohide=tohide;
		if(!collapse.cssjs('check',o,collapse.triggeropen)){
			collapse.cssjs('add',tohide,collapse.hideClass);
		}else{
			collapse.cssjs('add',tohide,collapse.showClass);
			collapse.currentOpen=o;
		}
		collapse.addEvent(o,'click',collapse.addCollapse,false);
		o.insertBefore(tl,o.firstChild);
		collapse.addEvent(tl,'click',collapse.addCollapse,false);
		// Safari hacks 
		tl.onclick=function(){return false;}
		o.onclick=function(){return false;}
	},
	addCollapse:function(e){
		var action,pic;
		// hack to fix safari's redraw bug 
		if (self.screenTop && self.screenX){
			window.resizeTo(self.outerWidth + 1, self.outerHeight);    
			window.resizeTo(self.outerWidth - 1, self.outerHeight);   
		}
		if(collapse.uniqueCollapse && collapse.currentOpen){
			collapse.cssjs('swap',collapse.currentOpen.tohide,collapse.showClass,collapse.hideClass);
			collapse.cssjs('remove',collapse.currentOpen,collapse.triggeropen);
			collapse.cssjs('add',collapse.currentOpen,collapse.trigger);
		}
		var o=collapse.getTarget(e);
		if(o.tohide){
			if(collapse.cssjs('check',o.tohide,collapse.hideClass)){
				collapse.cssjs('swap',o.tohide,collapse.hideClass,collapse.showClass);
				collapse.cssjs('add',o,collapse.triggeropen);
				collapse.cssjs('remove',o,collapse.trigger);
			}else{
				collapse.cssjs('swap',o.tohide,collapse.showClass,collapse.hideClass);
				collapse.cssjs('remove',o,collapse.triggeropen);
				collapse.cssjs('add',o,collapse.trigger);
			}
			collapse.currentOpen=o;
			collapse.cancelClick(e);
		}
		else{
			collapse.cancelClick(e);
		}
	},
	/* helper methods */
	getTarget:function(e){
		var target = window.event ? window.event.srcElement : e ? e.target : null;
		if (!target){return false;}
		while(!target.tohide && target.nodeName.toLowerCase()!='body')
		{
			target=target.parentNode;
		}
		return target;
	},
	cancelClick:function(e){
		if (window.event){
			window.event.cancelBubble = true;
			window.event.returnValue = false;
			return;
		}
		if (e){
			e.stopPropagation();
			e.preventDefault();
		}
	},
	addEvent: function(elm, evType, fn, useCapture){
		if (elm.addEventListener) 
		{
			elm.addEventListener(evType, fn, useCapture);
			return true;
		} else if (elm.attachEvent) {
			var r = elm.attachEvent('on' + evType, fn);
			return r;
		} else {
			elm['on' + evType] = fn;
		}
	},
	cssjs:function(a,o,c1,c2){
		switch (a){
			case 'swap':
				o.className=!collapse.cssjs('check',o,c1)?o.className.replace(c2,c1):o.className.replace(c1,c2);
			break;
			case 'add':
				if(!collapse.cssjs('check',o,c1)){o.className+=o.className?' '+c1:c1;}
			break;
			case 'remove':
				var rep=o.className.match(' '+c1)?' '+c1:c1;
				o.className=o.className.replace(rep,'');
			break;
			case 'check':
				return new RegExp("(^|\\s)" + c1 + "(\\s|$)").test(o.className)
			break;
		}
	}
}

collapse.addEvent(window, 'load', collapse.init, false);