plusimage  = "../images/arrow_blue_down.gif";
    minusimage = "../images/arrow_blue_side.gif";
  

  var head="display:''"
  img1=new Image()
  img1.src=plusimage;
  img2=new Image()
  img2.src=minusimage;
  var ns6=document.getElementById&&!document.all

  function change(e){
    if (!document.all&&!ns6)
      return
    var etarget=ns6?e.target:event.srcElement
    var imagetarget=etarget
    if (etarget.id=="foldheader"||ns6&&etarget.parentNode.id=="foldheader"){
      if (ns6&&etarget.parentNode.id=="foldheader"){
        nested=etarget.parentNode.nextSibling.nextSibling
        imagetarget=etarget.parentNode
      }
      else
        nested =ns6?etarget.nextSibling.nextSibling:document.all[etarget.sourceIndex+1]
      if (nested.style.display=="none") {
        nested.style.display=''
        imagetarget.src=plusimage;
      }
      else {
        nested.style.display="none"
        imagetarget.src=minusimage;
      }
    }
  }

  document.onclick=change
  
  //-->