<!doctype html>
<html>
<head>
<title>HTML5+CSS3+JavaScript</title>
<meta http-equiv="Content-Type" content="text/htmlcharset=gb2312" />
<meta http-equiv="Content-Type" content="text/htmlcharset=gbk" />
<meta http-equiv="Content-Type" content="text/htmlcharset=utf-8" />
<meta http-equiv="Content-Language" content="zh-cn" />
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<style type="text/css">
body {
behavior: url(ie-css3.htc)
}
* {margin:0 autopadding:0}
body {font-size:13pxfont-family:Arial}
ul li {list-style:none}
#menu {
width:982px
height:35px
margin-top:20pxdisplay:block
background: #e3e3e3
background: -moz-linear-gradient(top, #ccc, #999)
background: -webkit-gradient(linear, left top, left bottom, from(#ccc), to(#999))
-moz-box-shadow: 1px 1px 3px #333
-webkit-box-shadow: 1px 1px 3px #333
box-shadow: 1px 1px 3px #333
-webkit-border-top-left-radius:4px
-webkit-border-top-right-radius:4px
-moz-border-radius-topleft:4px
-moz-border-radius-topright:4px
-webkit-border-bottom-left-radius:4px
-webkit-border-bottom-right-radius:4px
-moz-border-radius-bottomleft:4px
-moz-border-radius-bottomright:4px
-o-border-radius:4px
-khtml-border-radius:4px
text-shadow: 0 1px 0 white
}
#menu ul {
margin-left:0
}
#menu ul li {
display:inline
}
#menu ul li a:link, a:visited {
text-align:centerfloat:leftwidth:6.8emtext-decoration:nonepadding:7.5px 0.75emfont-size:16pxfont-weight:boldmargin-top:0pxborder-right:1px solid #ccccolor: #454545
}
#menu ul li a:hover {
text-decoration:none
background:-webkit-gradient(linear, left top, left bottom, from(#333), to(#ccc))
background: -moz-linear-gradient(top, #333, #ccc)
-webkit-background-size:0 35px
color: #ddd
text-shadow: 0 1px 0 black
}
.text {
border:1px solid graywidth:150pxheight:17pxposition:relativetop:8pxleft:13pxfont-family:Arial
-webkit-border-top-left-radius:90px
-webkit-border-top-right-radius:90px
-moz-border-radius-topleft:90px
-moz-border-radius-topright:90px
-webkit-border-bottom-left-radius:90px
-webkit-border-bottom-right-radius:90px
-moz-border-radius-bottomleft:90px
-moz-border-radius-bottomright:90px
-o-border-radius:90px
-khtml-border-radius:90px
}
</style>
<script language="JavaScript" type="text/javascript">
(function()
{
if(!0)
return
var e = "abbr,article,aside,audio,bb,canvas,datagrid,datalist,details,dialog, eventsource,figure,footer,hgroup,header,mark,menu,meter,nav,output,progress,section,time,video".split(','),i=0,length=e.length
while(i<length)
{
document.createElement_x(e[i++])
}
})()
</script>
</head>
<body>
<menu id="menu"><form action="index.php" method="get">
<ul>
<li><a href="#" title="HomePage">HomePage</a></li>
<li><a href="#" title="Introuduce">Introuduce</a></li>
<li><a href="#" title="Products">Products</a></li>
<li><a href="#" title="My album">My album</a></li>
<li><a href="#" title="Shopping">Shopping</a></li>
<li><a href="#" title="Contact our">Contact our</a></li>
</ul>
<input type="search" class="text" value="search..." /></form>
</menu>
<body>
这个是用JS实现的。你百度一下，JS实现二级导航源码就有了。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html charset=gb2312" />
<title>简洁的纯CSS下拉菜单代码</title>
<style>
#sddm
{ margin: 0 auto
padding: 0
z-index: 30
background-color:#F4F4F4
width: 480px
height:23px}
#sddm li
{ margin: 0
padding: 0
list-style: none
float: left
font: bold 12px arial}
#sddm li a
{ display: block
margin: 0 1px 0 0
padding: 4px 10px
width: 60px
background: #5970B2
color: #FFF
text-align: center
text-decoration: none}
#sddm li a:hover
{ background: #49A3FF}
#sddm div
{ position: absolute
visibility: hidden
margin: 0
padding: 0
background: #EAEBD8
border: 1px solid #5970B2}
#sddm div a
{ position: relative
display: block
margin: 0
padding: 5px 10px
width: auto
white-space: nowrap
text-align: left
text-decoration: none
background: #EAEBD8
color: #2875DE
font: 12px arial}
#sddm div a:hover
{ background: #49A3FF
color: #FFF}
</style>
<!-- dd menu -->
<script type="text/javascript">
<!--
var timeout = 100
var closetimer = 10
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 style="text-align:center">
<ul id="sddm">
<li><a href="#" onmouseover="mopen('m1')" onmouseout="mclosetime()">Home</a>
<div id="m1" 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="#" onmouseover="mopen('m2')" onmouseout="mclosetime()">Download</a>
<div id="m2" 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="#" onmouseover="mopen('m3')" onmouseout="mclosetime()">Order</a>
<div id="m3" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
<a href="#">Visa Credit Card</a>
<a href="#">Paypal</a>
</div>
</li>
<li><a href="#" onmouseover="mopen('m4')" onmouseout="mclosetime()">Help</a>
<div id="m4" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
<a href="#">Download Help File</a>
<a href="#">Read online</a>
</div>
</li>
<li><a href="#" onmouseover="mopen('m5')" onmouseout="mclosetime()">Contact</a>
<div id="m5" onmouseover="mcancelclosetime()" onmouseout="mclosetime()">
<a href="#">E-mail</a>
<a href="#">Submit Request Form</a>
<a href="http://www.codefans.net/" target="_blank">codefans.net</a>
</div>
</li>
</ul>
</body>
</html>
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