超强的js导航菜单特效代码

提示：您可以先修改部分代码再运行

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>Drop-Down Menu </title>
	<meta name="keywords" content="">
	<meta name="description" content="">
	<link rel="stylesheet" type="text/css" href="css/default.css">

<script type="text/javascript">
<!--
var timeout         = 500;
var closetimer		= 0;
var ddmenuitem      = 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose; 
// -->
</script>

</head>
<body>

<h1>DropDown Menu</h1>

<p>This menu can be located anywhere on a page:</p>

<ul id="sddm">
	<li>Home
		<div id="m1" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
		HTML DropDown
		DHTML DropDown menu
		JavaScript DropDown
		DropDown Menu
		CSS DropDown
		</div>
	</li>
	<li>Download
		<div id="m2" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
		ASP Dropdown
		Pulldown menu
		AJAX dropdown
		DIV dropdown
		</div>
	</li>
	<li>Order
		<div id="m3" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
		Visa Credit Card
		Paypal
		</div>
	</li>
	<li>Help
		<div id="m4" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
		Download Help File
		Read online
		</div>
	</li>
	<li>Contact
		<div id="m5" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
		E-mail
		Submit Request Form
		Call Center
		</div>
	</li>
</ul>
<div style="clear:both"></div>

<div style="clear:both"></div>
<p>If you are looking for advanced script, see thetreelike unordered list.
<p>If you want to use this script on your page, please place link to http://javascript-array.com at one of your pages.

</body>
</html></td>
	  </tr>
	</table>

提示：您可以先修改部分代码再运行

补充：网页特效,导航菜单