// For change background color with mouse over
function chgBkG() {

}

// For expand and colleapse of items
function swapImg(imgname,imagefile) {
     imgname.src = imagefile
}

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

var contractsymbol='images/minus.gif' //Path to image to represent contract state.
var expandsymbol='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()

  sweeptoggle('contract');
}

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