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='-' //HTML for contract symbol. For image, use: <img src="whatever.gif">
var expandsymbol='+' //HTML for expand symbol.


if (document.getElementById) {
	document.write('<style type="text/css">')
	document.write('.switchcontent{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, "switchcontent")
	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