No3 = (parseInt(navigator.appVersion) > 3) ? 1:0;
layer = (document.all && No3) ? "document.all['L'+menu].style" : (document.layers && No3) ? "document.layers['L'+menu]" : 0;
var timer;

function Show() { 
    if(layer) {
	if(timer) clearTimeout(timer);
	for(menu=0; menu<Layer.length; menu++) { 
	    if(Layer[menu]) { 
		eval(layer).visibility = "hidden"; 
	    } 
	}
	for(i=0; i<arguments.length; i++) { 
	    menu=arguments[i]; eval(layer).visibility = "visible"; 
	}
    } 
}

function Hide() { 
    timer = setTimeout("Show()", 500); 
}