var lastshown="";
	var selected="";
	var lastarrow="";
	var s=""
	
	function show(item, arrow)
	{
		selected=item;
		if(lastshown=="")
		{
			document.getElementById(selected).style.display = "";
			//s = eval("document." + selected + ".style.display");
			//s = "";
			s = eval("document." + arrow);
			s.src = "images/opened.gif";
		}
		else
		{
			if(selected!=lastshown)
			{
				document.getElementById(selected).style.display = "";
				//s = eval("document." + arrow + ".style.display");
				//s = "";
				
				//document.getElementById(arrow).src = "images/opened.gif";
				s = eval("document." + arrow);
				s.src = "images/opened.gif";
				document.getElementById(lastshown).style.display = "none";
				//document.getElementById(lastarrow).src = "images/closed.gif";
				s = eval("document." + lastarrow);
				s.src = "images/closed.gif";
			}
			else
			{
				if(document.getElementById(selected).style.display == "")
				{
					document.getElementById(selected).style.display = "none";
					s = eval("document." + arrow);
					s.src = "images/closed.gif";
					//document.getElementById(arrow).src = "images/closed.gif";
				}
				else
				{
					document.getElementById(selected).style.display = "";
					s = eval("document." + arrow);
					s.src = "images/opened.gif";
					//document.getElementById(arrow).src = "images/opened.gif";
				}
			}
		}
		lastshown=selected;
		lastarrow=arrow;
	}