function checkParent(src, dest) 
{// Search for a specific parent of the current element
  while (src!=null) 
  {if (src.tagName == dest) return src;
   src = src.parentElement;
  }
return null;
}
function outline() 
{
 // Expand or collapse if a list item is clicked.
 var open = event.srcElement;
 // Make sure clicked inside an LI. This test allows rich HTML inside lists.
 var el = checkParent(open, "LI");
 if (null!=el) 
  {var pos = 0;
   
   // Search for a nested list
   for (pos=0; pos<el.children.length; pos++) 
     {if ("UL"==el.children[pos].tagName) {break;  }
	 
     }
   if (pos==el.children.length) {return;  }
   
  } 
  else {return; }
  
  el = el.children[pos];
  if ("UL"==el.tagName)
   {// Expand or Collapse nested list
   
     if ("none"==el.style.display)
	  {el.style.display = "block";
	  
      }
     else
      {el.style.display = "none";
      }
   }
event.cancelBubble = true;
}