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)

if (document.getElementById){
document.write('<style type="text/css">')
document.write('.expandablediv{display:none; color:#333333;}')
document.write('</style>')
}

function getElementbyClass(classname){
	aExpandableDivs=new Array()
	var inc=0
	var alltags=document.all? document.all : document.getElementsByTagName("*")
	for (i=0; i<alltags.length; i++){
		if (alltags[i].className==classname)
			aExpandableDivs[inc++]=alltags[i]
	}
}

function contractcontent(omit){
	var inc=0
	var imgid

	while (aExpandableDivs[inc]){
		if (aExpandableDivs[inc].id!=omit) {
			aExpandableDivs[inc].style.display="none";
			imgid = 'img' + aExpandableDivs[inc].id;
			document.getElementById(imgid).src="/images/TreePlus.gif";	
		}
		inc++
	}
}

function expandcontent(id){
	var divid = id
	if (typeof aExpandableDivs!="undefined"){
		if (collapseprevious=="yes")
			contractcontent(id)
		if (document.getElementById(divid).style.display != "block") {	
			document.getElementById(divid).style.display="block";
			document.getElementById('img'+id).src="/images/TreeMinus.gif";
		} else {
			document.getElementById(divid).style.display="none";
			document.getElementById('img'+id).src="/images/TreePlus.gif";
		}
	
	}
}

function revivecontent(){
	var imgid

	contractcontent("omitnothing")
	selectedItem=getselectedItem()
	selectedComponents=selectedItem.split("|")
	for (i=0; i<selectedComponents.length-1; i++) {
		document.getElementById(selectedComponents[i]).style.display="block";
		imgid = 'img' + selectedComponents[i];
		document.getElementById(imgid).src="/images/TreeMinus.gif";		
	}

}

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 (aExpandableDivs[inc]){
if (aExpandableDivs[inc].style.display=="block")
selectedItem+=aExpandableDivs[inc].id+"|"
inc++
}

document.cookie=window.location.pathname+"="+selectedItem
}

function do_onload(){
   getElementbyClass("expandablediv")
   if (enablepersist=="on" && typeof aExpandableDivs!="undefined")
	revivecontent()
}


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