https://zunjarneta.com/f5_js/jquery_006.js

1
2var timeout	= 500;
3var closetimer	= 0;
4var ddmenuitem	= 0;
5
6// open hidden layer
7function aopen(id)
8{	
9	// cancel close timer
10	mcancelclosetime();
11
12	// close old layer
13	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
14
15	// get new layer and show it
16	ddmenuitem = document.getElementById(id);
17	ddmenuitem.style.visibility = 'visible';
18
19}
20// close showed layer
21function mclose()
22{
23	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
24}
25
26// go close timer
27function closetime()
28{
29	closetimer = window.setTimeout(mclose, timeout);
30}
31
32// cancel close timer
33function mcancelclosetime()
34{
35	if(closetimer)
36	{
37		window.clearTimeout(closetimer);
38		closetimer = null;
39	}
40}
41
42// close layer when click-out
43document.onclick = mclose;