function selectAllDel(formName, delName) {
  for (i = 0; i < document.getElementById(formName).elements.length; i++)
     {
         var item = document.getElementById(formName).elements[i];
	     if (item.name == delName) item.checked = !item.checked;
	 }
}

function showhide(idname,idimage) {
  var name = document.getElementById(idname);
  var image = document.getElementById(idimage);
   if(name.style.display=='none')
   {
   name.style.display='block';
   image.src='images/filter_hide2.gif';
   }
   else
   {
   name.style.display='none';
   image.src='images/filter_view2.gif';
   }
}