/***********************************************
* Switch Content script II- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use. Last updated April 2nd, 2005.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

var enablepersist="on" //Enable saving state of content structure using session cookies? (on/off)
var memoryduration="7" //persistence in # of days

var contractsymbol='http://www.arietadev.com/www.esvh.com/services/images/minus.gif' //Path to image to represent contract state.
var expandsymbol='http://www.arietadev.com/www.esvh.com/services/images/plus.gif' //Path to image to represent expand state.

/////No need to edit beyond here //////////////////////////

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 inc=0
	while (ccollect[inc]) {
		ccollect[inc].style.display=(ec=="contract")? "none" : ""
		inc++
	}
	
	revivestatus()
}


function expandcontent(curobj, cid) {
	if (ccollect.length>0) {
		document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="none")? "none" : ""
		curobj.src=(document.getElementById(cid).style.display=="none")? expandsymbol : contractsymbol
	}
}

function revivecontent() {
	selectedItem=getselectedItem()
	selectedComponents=selectedItem.split("|")
	for (i=0; i<selectedComponents.length-1; i++)
	document.getElementById(selectedComponents[i]).style.display="none"
}

function revivestatus() {
	var inc=0
	while (statecollect[inc]) {
		if (ccollect[inc].style.display=="none")
			statecollect[inc].src=expandsymbol
		else
			statecollect[inc].src=contractsymbol
			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=="none")
		selectedItem+=ccollect[inc].id+"|"
		inc++
	}
	
	if (get_cookie(window.location.pathname)!=selectedItem){ //only update cookie if current states differ from cookie's
		var expireDate = new Date()
		expireDate.setDate(expireDate.getDate()+parseInt(memoryduration))
		document.cookie = window.location.pathname+"="+selectedItem+";path=/;expires=" + expireDate.toGMTString()
	}
}

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" && get_cookie(window.location.pathname)!="" && ccollect.length>0)
		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