/***********************************************
* 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"; 
  var persisttype="sitewide";

  if (document.getElementById)
  {
    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("navigation").getElementsByTagName("span"); 
      if(el.style.display != "block")
      {
        for (var i=0; i<ar.length; i++)
        {
          if (ar[i].className=="submenu")
            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;