now = 0;
function show(val)
{
	if(now != 0 && now != val)
		document.all("sub"+now).style.display = "none";	
	if(document.all("sub"+val).style.display == "none")
		document.all("sub"+val).style.display = "block";
	else
		document.all("sub"+val).style.display = "none";
	now = val;
}