// open menu x
	function OpenMenu (x) {
		var menus=4;
	
		if (document.getElementById)  {
			showmenu = document.getElementById('menu'+x);
			showmenu.style.visibility = 'visible';

			for (i = 0; i <= menus; i++) {
				currentmenu = document.getElementById('menu'+i);
				if ((currentmenu.style.visibility == "visible") && (currentmenu != showmenu))  {
					currentmenu.style.visibility = "hidden";
				}
			}
		}
	}

// hide all menus
	function Close()   {
        		var menus=4;
		
		if (document.getElementById)  {
			for (i = 0; i <= menus; i++) {
               			document.getElementById('menu'+i).style.visibility = 'hidden';
	        		} 
		}
	}