var oldwhich="";
	function hideshow(which)
	{
		if (oldwhich!="" )
		 oldwhich.style.display="none";
		if (!document.getElementById)
		return
		if (which.style.display=="")
			which.style.display="none"
		else
		 which.style.display=""
          		
		oldwhich=which; 
		
	}