function showSubMenu(j) {
		if(document.all) {
			eval('document.all.sub' + j + '.style.visibility = "visible"');
		} else {
			eval('document.getElementById("sub' + j + '").style.visibility = "visible"');
		}		
	}
	
	function hideSubMenu(j) {
		if(document.all) {
			eval('document.all.sub' + j + '.style.visibility = "hidden"');
		} else {
			eval('document.getElementById("sub' + j + '").style.visibility = "hidden"');
		}
	}