function exMenu(tName)
{ 
	tMenu = document.getElementById(tName).style;
	if (tMenu.display == 'none')
	{
	tMenu.display = "block";
	}else{
	tMenu.display = "none";
	}
 
//	tMenu = document.all[tName].style;
//	if (tMenu.display == 'none') tMenu.display = "block"; else tMenu.display = "none";
}