var persistmenu = "yes" //"yes" or "no". Make sure each SPAN 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 (document.getElementById) { //DynamicDrive.com change
    document.write('<style type="text/css">\n')
    document.write('.submenu{display: none;}\n')
    document.write('</style>\n')
}

function SwitchMenu(obj) {
    if (document.getElementById) {
        var el = document.getElementById(obj);
        var ar = document.getElementById("masterdiv").getElementsByTagName("span"); //DynamicDrive.com change
        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";
            }
            el.style.display = "block";
        } else {
            el.style.display = "none";
        }
    }
}

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 onloadfunction() {
    if (persistmenu == "yes") {
        var cookiename = (persisttype == "sitewide") ? "switchmenu" : window.location.pathname
        var cookievalue = get_cookie(cookiename)
        if (cookievalue != "")
            document.getElementById(cookievalue).style.display = "block"
    }
}

function savemenustate() {
    var inc = 1, blockid = ""
    while (document.getElementById("sub" + inc)) {
        if (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
    document.cookie = cookiename + "=" + cookievalue
}

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

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