function expandCollapse(elem,hid_elems,changeImage)
{
 // if (document.getElementById){
  var hid_elem;
  for(hid_elem in hid_elems){document.getElementById(hid_elems[hid_elem]).style.display="none";}

  ecBlock = document.getElementById(elem);
  currentDisplay = ecBlock.style.display;

  // if (ecBlock != undefined && ecBlock != null){
   if (changeImage){elemImage = document.getElementById(elem + "_Image");}
   // if (!changeImage || (elemImage != undefined && elemImage != null)){
     if (currentDisplay == "none" || currentDisplay == null || currentDisplay == ""){
       ecBlock.style.display = "block";
       if (changeImage){elemImage.src = "images/tree_up.gif";}
     } else if (currentDisplay == "block"){
       ecBlock.style.display = "none";
       if (changeImage){elemImage.src = "images/tree_down.gif";}
     } else {
       ecBlock.style.display = "block";
       if (changeImage){elemImage.src = "images/tree_up.gif";}
     }
   // }//end check elemImage
  // }//end check ecBlock
  // ecBlock.style.display = "block";
 // }//end getElemById
}//end expandCollapse