CSS竖向菜单，多级展开_菜单导航特效

符合标准的CSS多级菜单，竖向排列，鼠标移上任一项，会向右展开出对应子项菜单，通过W3C测试，兼容性良好，你可以变通一下，变成横向就更舒服了，研究一下哦。

<!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" lang="zh-CN">
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312" />
<title>css菜单</title>
<style type="text/css">
<!--
*{margin:0;padding:0;border:0;}
body {
 font-family: arial, 宋体, serif;
        font-size:12px;
}

#nav {
  line-height: 24px;  list-style-type: none; background:#666;   width:80px;
}

#nav a {
 display: block; width: 80px; text-align:center;
}

#nav a:link  {
 color:#666; text-decoration:none;
}
#nav a:visited  {
 color:#666;text-decoration:none;
}
#nav a:hover  {
 color:#FFF;text-decoration:none;font-weight:bold;
}

#nav li {
 /*float: left*/; width: 80px; background:#CCC;
}
#nav li a:hover{
 background:#999;
}
#nav li ul {
 line-height: 27px;  list-style-type: none;text-align:left;
 left: -999em; width: 180px; position: absolute; 
}
#nav li ul li{
 float: left; width: 180px;
 background: #F6F6F6; 
}

#nav li ul a{
 display: block; width: 180px;w\idth: 156px;text-align:left;padding-left:24px;
}

#nav li ul a:link  {
 color:#666; text-decoration:none;
}
#nav li ul a:visited  {
 color:#666;text-decoration:none;
}
#nav li ul a:hover  {
 color:#F3F3F3;text-decoration:none;font-weight:normal;
 background:#C00;
}

#nav li:hover ul {
 left: auto;
}
#nav li.sfhover ul {
 left: auto;
}
#nav li.sfhover a {
 float:left;
}
#mrc {
 clear: left; 
}
-->
</style>
<script type=text/javascript>
function menuFix() {
 var sfEls = document.getElementById("nav").getElementsByTagName("li");
 for (var i=0; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseDown=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onMouseUp=function() {
  this.className+=(this.className.length>0? " ": "") + "sfhover";
  }
  sfEls[i].onmouseout=function() {
  this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), "");
  }
 }
}
window.onload=menuFix;
</script>

</head>
<body>

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所属频道：菜单导航特效/更新时间：2010-05-22

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