/***********************************************
  * Switch Content script- © Dynamic Drive (www.dynamicdrive.com)
  * This notice must stay intact for legal use. Last updated Oct 21st, 2003.
  * Visit http://www.dynamicdrive.com/ for full source code
  ***********************************************/

  var enablepersist="on"     //Enable saving state of content structure using session cookies? (on/off)
  var collapseprevious="yes" //Collapse previously open content when opening present? (yes/no)

  if (document.getElementById)
    {
    document.write('<style type="text/css">')
    document.write('.switchcontent{display:none;}')
    document.write('</style>')
    }

  function getElementbyClass(classname)
    {
    ccollect=new Array()
    var inc=0
    var alltags=document.all? document.all : document.getElementsByTagName("*")
    for (i=0; i<alltags.length; i++)
      {
      if (alltags[i].className==classname) ccollect[inc++]=alltags[i]
      }
    }

  function contractcontent(omit)
    {
    var inc=0
    while (ccollect[inc])
      {
      if (ccollect[inc].id!=omit) ccollect[inc].style.display="none"
      inc++
      }
    }

  function expandcontent(cid)
    {
    if (typeof ccollect!="undefined")
      {
      if (collapseprevious=="yes") contractcontent(cid)
      document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
      }
    }

  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 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()
    {
    getElementbyClass("switchcontent")
    if (enablepersist=="on" && typeof ccollect!="undefined") revivecontent()
    }

  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