<html>
<head>
<script type="text/javascript">
 
var TimeOut         = 300;
var currentLayer    = null;
var currentitem     = null;
 
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;
 
// Open Hidden Layer
function mopen(n)
{
    var l  = document.getElementById("menu"+n);
    var mm = document.getElementById("mmenu"+n);
   
    if(l)
    {
        mcancelclosetime();
        l.style.visibility='visible';
 
        if(currentLayer && (currentLayerNum != n))
            currentLayer.style.visibility='hidden';
 
        currentLayer = l;
        currentitem = mm;
        currentLayerNum = n;           
    }
    else if(currentLayer)
    {
        currentLayer.style.visibility='hidden';
        currentLayerNum = 0;
        currentitem = null;
        currentLayer = null;
    }
}
 
// Turn On Close Timer
function mclosetime()
{
    closeTimer = window.setTimeout(mclose, TimeOut);
}
 
// Cancel Close Timer
function mcancelclosetime()
{
    if(closeTimer)
    {
        window.clearTimeout(closeTimer);
        closeTimer = null;
    }
}
 
// Close Showed Layer
function mclose()
{
    if(currentLayer && noClose!=1)
    {
        currentLayer.style.visibility='hidden';
        currentLayerNum = 0;
        currentLayer = null;
        currentitem = null;
    }
    else
    {
        noClose = 0;
    }
 
    currentLayer = null;
    currentitem = null;
}
 
// Close Layer Then Click-out
document.onclick = mclose;
</script>
<style>
#dd
{   margin: 0;
    padding: 0}
 
#dd li
{   margin: 0;
    padding: 0;
    list-style: none;
    float: left;
    font: bold 11px arial}
 
#dd li a.menu
{   display: block;
    text-align: center;
    background: #5970B2;
    padding: 4px 10px;
    margin: 0 1px 0 0;
    color: #FFF;
    width: 100px;
    text-decoration: none}
 
#dd li a.menu:hover
{   background: #49A3FF}
 
.submenu
{   background: #EAEBD8;
    border: 1px solid #5970B2;
    visibility: hidden;
    position: absolute;
    z-index: 3}
 
    .submenu a
    {   display: block;
        font: 11px arial;
        text-align: left;
        text-decoration: none;
        padding: 5px;
        color: #2875DE}
 
    .submenu a:hover
    {   background: #49A3FF;
        color: #FFF}
 
</style>
</head>
<body>
 
<ul id="dd">
    <li>
        <a href="#" class="menu" id="mmenu1" onmouseover="mopen(1);" onmouseout="mclosetime();">Home</a>
        <div class="submenu" id="menu1" onmouseover="mcancelclosetime()" onmouseout="mclosetime();">
            <a href="#">HTML DropDown</a>
            <a href="#">DHTML DropDown menu</a>
            <a href="#">JavaScript DropDown</a>
            <a href="#">DropDown Menu</a>
            <a href="#">CSS DropDown</a>
        </div>
    </li>
    <li>
        <a href="#" class="menu" id="mmenu2" onmouseover="mopen(2);" onmouseout="mclosetime();">Download</a>
        <div class="submenu" id="menu2" onmouseover="mcancelclosetime()" onmouseout="mclosetime();">
            <a href="#">ASP Dropdown</a>
            <a href="#">Pulldown menu</a>
            <a href="#">AJAX dropdown</a>
            <a href="#">DIV dropdown</a>
        </div>
    </li>
    <li><a href="#" class="menu">Order</a></li>
    <li><a href="#" class="menu">Help</a></li>
    <li><a href="#" class="menu">Contact</a></li>
</ul>
</body>
</html>