function toggleHelpVisibility(hyperlinkID, helpElementID)
        {
	    try
	    {
		var theLinkElem=document.getElementById(hyperlinkID);
		var theHelpElem=document.getElementById(helpElementID);

		if(theLinkElem == null)
		{
			alert("Hyperlink with ID " + hyperlinkID + " cannot be found!");
			return;
		}

		if(theHelpElem == null)
		{
			alert("Additional information item with ID " + helpElementID + " is not available");
			return;
		}

		if( theHelpElem.style.display.toLowerCase() == "none" || 
		    theHelpElem.style.display.toLowerCase() == "" )
		{
		
			theHelpElem.style.display = "block";
			theLinkElem.innerHTML=" show less »";
		}
		else
		{
			theHelpElem.style.display = "none";
			theLinkElem.innerHTML=" get details »";
		}
  	    }
	    catch(e)
	    {
		alert("some error occurred toggling visibility of element " + helpElementID + ": " + e);
	    }
        }