/***********************************************
* Switch Menu script- by Martial B of http://getElementById.com/
* Modified by Dynamic Drive for format & NS4/IE4 compatibility
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

var persistmenu="yes" //"yes" or "no". Make sure each div content contains an incrementing ID starting at 1 (id="sub1", id="sub2", etc)
var persisttype="sitewide" //enter "sitewide" for menu to persist across site, "local" for this page only

if (parent.document.getElementById){ //DynamicDrive.com change
parent.document.write('<style type="text/css">\n')
parent.document.write('.submenu{display: none;}\n')
parent.document.write('</style>\n')
}

function SwitchMenu(obj, fld){
    /***********************************************
    * Modified by Yi Zhou for switch folder images
    ***********************************************/
    if(parent.document.getElementById){
	    var el = parent.document.getElementById("sub"+fld);
	    var ar = parent.document.getElementById("menudiv").getElementsByTagName("div"); //DynamicDrive.com change
	    var fldAr = parent.document.getElementById("menudiv").getElementsByTagName("img");
		if(el.style.display != "block"){ //DynamicDrive.com change
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="submenu") //DynamicDrive.com change
    				ar[i].style.display = "none";
			}
			for (var m=0; m<fldAr.length; m++) {
                if (fldAr[m].className == "folder")
                     fldAr[m].setAttribute("src","images/plus.gif"); 
            }
			el.style.display = "block";
			for (var m=0; m<fldAr.length; m++) {
			    if (fldAr[m].name == "folder"+fld)
			        fldAr[m].setAttribute("src","images/minus.gif"); 
			}
		}else{
			el.style.display = "none";
			for (var m=0; m<fldAr.length; m++) {
                    if (fldAr[m].className == "folder")
                    fldAr[m].setAttribute("src","images/plus.gif"); 
            }
		}
    }
}

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

function onloadfunction(){
if (persistmenu=="yes"){
var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname
var cookievalue=get_cookie(cookiename)
if (cookievalue!=""){
//if (cookievalue!="sub1"){
//parent.document.getElementById("sub1").style.display="none"
//parent.document.getElementById("menudiv").getElementsByTagName("img")[0].setAttribute("src","images/plus.gif")
//}
//parent.document.getElementById(cookievalue).style.display="block"
//parent.document.getElementById("menudiv").getElementsByTagName("img")[cookievalue.substring(3)-1].setAttribute("src","images/minus.gif")
parent.document.getElementById("sub1").style.display="block"
}
}
}

function savemenustate(){
var inc=1, blockid="", imgid=""
while (parent.document.getElementById("sub"+inc)){
if (parent.document.getElementById("sub"+inc).style.display=="block"){
blockid="sub"+inc
break
}
inc++
}
var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname
var cookievalue=(persisttype=="sitewide")? blockid+";path=/" : blockid
parent.document.cookie=cookiename+"="+cookievalue
}

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

if (persistmenu=="yes" && parent.document.getElementById)
window.onunload=savemenustate