var enablepersist="on" //Enable saving state of content structure using session cookies? (on/off)
var collapseprevious="no" //Collapse previously open content when opening present? (yes/no)

var contractsymbol='<img src="./images/openbut.gif" alt="open" /> ' //image for contract symbol.
var expandsymbol='<img src="./images/closedbut.gif" alt="closed" /> ' //image for expand symbol.

if (document.getElementById){
	document.write('<style type="text/css">')
	document.write('.onoff{display:none;}')
	document.write('</style>')
}

function getElementbyClass(rootobj, classname){
	var temparray=new Array()
	var inc=0
	var rootlength=rootobj.length
	for (i=0; i<rootlength; i++){
		if (rootobj[i].className==classname)
			temparray[inc++]=rootobj[i]
		}
	return temparray
}

function sweepToggle(ec){
	var thestate=(ec=="expand")? "block" : "none"
	var inc=0
	while (ccollect[inc]){
		ccollect[inc].style.display=thestate
		inc++
	}
	reviveStatus()
}


function contractContent(omit){
	var inc=0
	while (ccollect[inc]){
		if (ccollect[inc].id!=omit)
			ccollect[inc].style.display="none"
			inc++
	}
}

function expandContent(curobj, cid){
	var spantags=curobj.getElementsByTagName("span")
	var showstateobj=getElementbyClass(spantags, "showstate")
	if (ccollect.length>0){
		if (collapseprevious=="yes")
			contractContent(cid)
			document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
			if (showstateobj.length>0){ //if "showstate" span exists in header
				if (collapseprevious=="no")
				showstateobj[0].innerHTML=(document.getElementById(cid).style.display=="block")? contractsymbol : expandsymbol
			else
				reviveStatus()
			}
	}
}

function reviveContent(){
	contractContent("omitnothing")
	selectedItem=getselectedItem()
	selectedComponents=selectedItem.split("|")
	for (i=0; i<selectedComponents.length-1; i++)
		document.getElementById(selectedComponents[i]).style.display="block"
}

function reviveStatus(){
	var inc=0
	while (statecollect[inc]){
		if (ccollect[inc].style.display=="block")
			statecollect[inc].innerHTML=contractsymbol
		else
			statecollect[inc].innerHTML=expandsymbol
			inc++
	}
}

function get_cookie(Name) { 
	var search = Name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		if (offset != -1) { 
			offset += search.length
			end = document.cookie.indexOf(";", offset);
			if (end == -1) end = document.cookie.length;
			returnvalue=unescape(document.cookie.substring(offset, end))
		}
	}
	return returnvalue;
}

function getselectedItem(){
	if (get_cookie(window.location.pathname) != ""){
		selectedItem=get_cookie(window.location.pathname)
		return selectedItem
	}
	else
		return ""
}

function saveswitchstate(){
	var inc=0, selectedItem=""
	while (ccollect[inc]){
		if (ccollect[inc].style.display=="block")
			selectedItem+=ccollect[inc].id+"|"
			inc++
	}
	document.cookie=window.location.pathname+"="+selectedItem
}

function do_onload(){
	uniqueidn=window.location.pathname+"firsttimeload"
	var alltags=document.all? document.all : document.getElementsByTagName("*")
	ccollect=getElementbyClass(alltags, "onoff")
	statecollect=getElementbyClass(alltags, "showstate")
	if (enablepersist=="on" && ccollect.length>0){
		document.cookie=(get_cookie(uniqueidn)=="")? uniqueidn+"=1" : uniqueidn+"=0" 
		firsttimeload=(get_cookie(uniqueidn)==1)? 1 : 0 //check if this is 1st page load
		if (!firsttimeload)
			reviveContent()
	}
	if (ccollect.length>0 && statecollect.length>0)
		reviveStatus()
}

if (window.addEventListener)
	window.addEventListener("load", do_onload, false)
else if (window.attachEvent)
	window.attachEvent("onload", do_onload)
else if (document.getElementById)
	window.onload=do_onload

if (enablepersist=="on" && document.getElementById)
	window.onunload=saveswitchstate