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

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

function getElementbyClass(classname)
{
	ccollect=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)
			ccollect[inc++]=alltags[i]
	}
}

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

function expandcontent(cid)
{
	if (typeof ccollect!="undefined")
	{
		if (collapseprevious=="yes")
			contractcontent(cid)
		document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
	}
}

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 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()
{
	getElementbyClass("switchcontent")
	if (enablepersist=="on" && typeof ccollect!="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