代码简介：
仿雅虎首页网站快捷入口导航模块的代码，里面有用户登录框，这个大家或许会用上吧，放到你网站着页作为用户登录也挺行。
代码内容：
<!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>
<title>JS+CSS仿雅虎首页网站快捷入口的切换效果_网页代码站(www.webdm.cn)</title>
<style>
*{ margin:0; padding:0; border:none;}
body{font:12px/130% verdana,geneva,arial,helvetica,sans-serif; height:100%;}li{list-style:none;}
html{ height:100%;}
.clearfix:after{content:" ";display:block;height:0;clear:both;visibility:hidden;}.clearfix{display:inline-block;}
a:link{ color:#000; text-decoration:none; }
a:visited{ color:#000; text-decoration:none; }
a:hover{ color:#000; text-decoration:none; }
.rrow{224px;}
.login{ background:url(http://www.webdm.cn/images/20101210/1/box.png); height:210px;224px; overflow:hidden;}
.login h2{ color:#fff; font-size:14px; padding:4px 12px; line-height: 30px;height:24px; overflow:hidden; }
.login h2 span{ font-size:12px; float:right;margin:-31px 23px 0 0;line-height: 32px;font-weight:400; cursor:pointer;}
.rrow ul{ margin:5px 6px; }
.rrow ul li {216px; height:31px;margin-bottom: 5px; overflow:hidden; float:left;}
.rrow ul li a,.rrow ul li span{ cursor:pointer; display:block; float:left; margin-right: 4px; background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -152px;
69px;padding-left:35px; height:31px; overflow:hidden; line-height: 32px; font-weight:700;}
.rrow ul li .lhover{ display:block; float:left; margin-right: 4px; background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -183px; 69px;padding-
left:35px; height:37px; overflow:hidden; line-height: 32px; font-weight:700;}
.rrow ul li .yhzc{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -152px;}
#yhzc{background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -183px;height:37px;}
.rrow ul li .hysj{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -152px; }
#hysj{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -183px;height:37px;}
.rrow ul li .fbxx{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -220px; }
#fbxx{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -251px;height:37px;}
.rrow ul li .gstg{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -220px; }
#gstg{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -251px;height:37px;}
.rrow ul li .xzmj{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -288px; }
#xzmj{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -319px;height:37px;}
.rrow ul li .bzzx{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -288px; }
#bzzx{ background:url(http://www.webdm.cn/images/20101210/1/title.gif) -104px -319px;height:37px;}
.rrow ul .hoverli{background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -357px;height:92px; overflow:hidden; line-height: 32px; font-weight:700;}
.qlogin{height:92px; 210px; line-height: 32px; margin:5px 0 0 10px; display:none;}
.qlogin dt{ height:0; overflow:hidden; }
.qlogin dd{ padding:4px; 210px; height:22px; text-align:left; float:left;clear:both;overflow:hidden;}
.qlogin dd .passw,.qlogin a:hover.passw{ margin: -4px 12px 0 0; float:right;}
.rrow ul li div{ margin-top: 5px; 210px; display:none;}
.rrow ul li div a,.rrow ul li div a:hover{background:url(http://www.webdm.cn/images/20101210/1/title.gif) -80px -1px; height:20px; line-height: 20px; clear:both; font-
weight: 400; 170px;}
.rrow ul li div a:hover{ text-decoration:underline; }
.rrow ul li .block,.rrow .block{ display:block; }
.rrow ul .none{ display:none; }
.btn{font-size:12px; font-family:宋体; float:left; 57px; height:20px; overflow:hidden; background:url(http://www.webdm.cn/images/20101210/1/title.gif); line-
height: 21px;padding-left:18px;margin-right: 10px; }
a:hover.btn{background:url(http://www.webdm.cn/images/20101210/1/title.gif) 0 -20px;}
#btn4{background:url(http://www.webdm.cn/images/20101210/1/title.gif);75px; margin-left: 48px; cursor:pointer;}
.input2{font-size:12px; border:1px solid #999; 140px; height:16px; padding:1px 2px 0 2px; }
</style>
</head>
<body>
<table width="18%" height="420" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td><div class="rrow">
<div id="login" class="login">
<h2>便捷入口<span><a class="w" title="快速登陆">快速登陆</a></span></h2>
<dl class="qlogin clearfix">
<dt>快速登陆</dt>
<dd>用户名：
<input name="text" type="text" class="input2" />
</dd>
<dd>密 码：
<input name="password" type="password" class="input2" />
</dd>
<dd>
<input name="submit" type="submit" class="btn" id="btn4" value="立即登陆" />
<a class="passw" href="#" target="_blank">忘记密码？</a></dd>
</dl>
<ul>
<li id="btype1" class="hoverli"><span class="yhzc" id="yhzc" href="#" target="_blank" title="用户注册">用户注册</span><span class="hysj" href="#"
target="_blank" title="会员升级">会员升级</span>
<div class="block"><a href="#" target="_blank">1...</a><a href="#" target="_blank">1...</a></div>
<div><a href="#" target="_blank">2...</a><a href="#" target="_blank">2...</a></div>
</li>
<li id="btype2"><span class="fbxx" href="#" target="_blank" title="发布信息">发布信息</span><span class="gstg" href="#" target="_blank" title="公司推广">公司
推广</span>
<div><a href="#" target="_blank">3...</a><a href="#" target="_blank">3...</a></div>
<div><a href="#" target="_blank">4...</a><a href="#" target="_blank">4...</a></div>
</li>
<li id="btype3"><span class="xzmj" href="#" target="_blank" title="寻找买家">寻找买家</span><span class="bzzx" href="#" target="_blank" title="帮助中心">帮助
中心</span>
<div><a href="#" target="_blank">5...</a><a href="#" target="_blank">5...</a></div>
<div><a href="#" target="_blank">6...</a><a href="#" target="_blank">6...</a></div>
</li>
</ul>
</div>
<script type=text/javascript>
var login = document.getElementById("login");
var yhzc = document.getElementById("yhzc");
var h2 = login.getElementsByTagName("h2");
var dl = login.getElementsByTagName("dl");
var ul = login.getElementsByTagName("ul");
var lis = ul[0].getElementsByTagName("li");
var allspan = ul[0].getElementsByTagName("span");
var qlog = h2[0].getElementsByTagName("a");
var divs = login.getElementsByTagName("div");
qlog[0].onclick = function()
{
for(var i = 0; i < divs.length; i++)
{divs[i].className = null;}
for(var i = 0; i < allspan.length; i++)
{allspan[i].id = null;}
lis[0].className = "none";
dl[0].className = "qlogin block";
}
for(var x = 1; x < 4; x++)
{show();}
function show()
{
var test = "btype" +x;
var btype = document.getElementById("btype" + x);
var as = btype.getElementsByTagName("a");
var bdivs = btype.getElementsByTagName("div");
var spans = btype.getElementsByTagName("span");
for(var i = 0; i < spans.length; i++)
{
spans[i].num = i;
spans[i].onmouseover = type;
}
function type()
{
for(var i = 0; i < lis.length; i++)
{lis[i].className = null;}
for(var i = 0; i < allspan.length; i++)
{allspan[i].id = null;}
for(var i = 0; i < divs.length; i++)
{divs[i].className = null;}
dl[0].className = "qlogin";
yhzc.id = null;
spans[this.num].id = spans[this.num].className;
bdivs[this.num].className = "block";
btype.className = "hoverli";
}
}
</script>
</div>
</td>
</tr>
</table>
<br />
<p><a href="http://www.webdm.cn">网页代码站</a> - 最专业的网页代码下载网站 - 致力为中国站长提供有质量的网页代码！</p>
</body>
</html>
代码来自：http://www.webdm.cn/webcode/7995ca89-dd34-4333-87b2-7857225cc1f7.html