var expandedTriggerClass='triggerexpanded';
var normalTriggerClass='triggernormal';
var hoverTriggerClass='triggerhover';
var normalElementClass='elementnormal';
var collapsedElementClass='elementcollapsed';
var collapsedElements=new Array();
var triggerElements=new Array();

function domCollapse()
{
	if(document.getElementById && document.createTextNode)
	{
		//parentElementId='collapsesection';
		//triggerelements='h2';
		var triggerClass=/trigger/;
	
		var elms,tohide,colobj,elementsToCheck,triggerelements,parentElementId;
		elementsToCheck=triggerelements?triggerelements:'*';

		if(parentElementId)
		{
			elms=document.getElementById('parentElementId').getElementsByTagName(elementsToCheck);
		} else {
			elms=document.getElementsByTagName(elementsToCheck);
		}

		for (i=0;i<elms.length;i++)
		{
			if(triggerClass.test(elms[i].className))
			{
				tohide=elms[i].nextSibling;
				while(tohide.nodeType!=1)
				{
					tohide=tohide.nextSibling;
				}

				collapsedElements.push(tohide)
				triggerElements.push(elms[i])
				juggleClass(tohide,normalElementClass,0);
				juggleClass(tohide,collapsedElementClass,1);
				elms[i].colobj=tohide;
				elms[i].onmouseover=function(){doTriggerHover(this);}
				elms[i].onmouseout=function(){juggleClass(this,hoverTriggerClass,0);}
				elms[i].onclick=function(){doDomCollapse(this,this.colobj);return false}
				elms[i].className=elms[i].className+' '+normalTriggerClass;
			}
		}
	}
}


function doTriggerHover(o)
{
	if(!checkClass(hoverTriggerClass,o) && !checkClass(expandedTriggerClass,o))
	{
		juggleClass(o,hoverTriggerClass,1);
	}
}


function doDomCollapse(o,t)
{
	if(t)
	{
		if(checkClass(collapsedElementClass,t))
		{
			juggleClass(t,collapsedElementClass,0);
			juggleClass(t,normalElementClass,1);
			juggleClass(o,normalTriggerClass,0);
			juggleClass(o,expandedTriggerClass,1);
		} else {
			juggleClass(t,normalElementClass,0);
			juggleClass(t,collapsedElementClass,1);
			juggleClass(o,expandedTriggerClass,0);
			juggleClass(o,normalTriggerClass,1);
		}
	}
}


function doDomCollapseAll(state){
	var i,o,t;

	for(i=0;i<collapsedElements.length;i++){
		t=collapsedElements[i];	
		o=triggerElements[i];	

		if(state==1){
			juggleClass(t,collapsedElementClass,0);
			juggleClass(t,normalElementClass,1);
			juggleClass(o,normalTriggerClass,0);
			juggleClass(o,expandedTriggerClass,1);
		} else {
			juggleClass(t,normalElementClass,0);
			juggleClass(t,collapsedElementClass,1);
			juggleClass(o,expandedTriggerClass,0);
			juggleClass(o,normalTriggerClass,1);
		}
	}
}


function juggleClass(o,c,s)
{
	if(s==0) 
	{
		o.className=o.className.replace(c,'');	
	}

	if (s==1 && !checkClass(c,o))
	{
		o.className+=' '+c
	}
}


function checkClass(c,o)
{
	var re=new RegExp('\\b'+c+'\\b');
	return re.test(o.className);
}

		window.onload=domCollapse;