function toggleExpandCollapse(x,y)
{
   var objSpan = document.getElementById(x);
   var objImage = document.getElementById(y);

   if (objSpan.style.display == "none")
   {
       objSpan.style.display = "";
       objImage.src = "themes/Default/images/expand_minus.gif";
   }
   else
   {
      objSpan.style.display = "none";
      objImage.src = "themes/Default/images/expand_plus.gif";
   }
}