DIV+CSS实现的横向二级菜单代码,Css代码库,德仔网

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【Css】 DIV+CSS实现的横向二级菜单
作者:Dezai.CN / 发布于2013/6/13/ 707

	<!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>Horizontal Drop Down Menus</title>
	<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
	<script type=text/javascript>
	/**
	*菜单的构造,需要绑定到onload
	*/
	startList = function() {
	if (document.all&&document.getElementById) {
	dropmenuRoot = document.getElementById("dropmenu");
	 for (i=0; i<dropmenuRoot.childNodes.length; i++) {
	 node = dropmenuRoot.childNodes[i];
	 if (node.nodeName=="LI") {
	 node.onmouseover=function() {
	 this.className+=" over";
	 //开始灌水
	 for(j=0;j<this.childNodes.length;j++){
	 if (this.childNodes[j].nodeName=="UL"){
	 if (this.childNodes[j].childNodes[0].nodeName=="LI"){
	 if (this.offsetLeft+this.childNodes[j].childNodes.length*
	 this.childNodes[j].childNodes[0].offsetWidth-dropmenuRoot.offsetLeft>
	 dropmenuRoot.offsetWidth)
	 {
	 //菜单的长度
	 var len=this.childNodes[j].childNodes.length*
	 this.childNodes[j].childNodes[0].offsetWidth;
	 //给ul设置宽度如果子菜单比较多，大于容器的宽度，那么ul的宽度就是容器的宽度
	 (len>dropmenuRoot.offsetWidth) ? this.childNodes[j].style.width=
	 776+"px" : this.childNodes[j].style.width=len+"px";
	 len =this.offsetLeft+len-dropmenuRoot.offsetLeft-dropmenuRoot.offsetWidth;
	 (len>this.offsetLeft-dropmenuRoot.offsetLeft) ? this.childNodes[j].style.marginLeft=
	 -(this.offsetLeft-dropmenuRoot.offsetLeft) : this.childNodes[j].style.marginLeft=
	 -len+"px";
	 }
	 }
	 }
	 }
	 }
	 //灌水完毕
	 node.onmouseout=function() {
	 this.className=this.className.replace(" over", "");
	 }
	 }
	}
	}
	}
	window.onload=startList;
	</script>
	</head>
	<style type="text/css">
	body
	{
	 font: normal 11px verdana; background: #45b97c;
	 position:absolute
	}
	ul { margin: 0; padding: 0; }
	li { list-style-position: outside; list-style: none;}
	a { text-decoration: none; color: #666;}
	ul#dropmenu,ul#dropmenu ul{
	 margin: 0 auto;
	 text-align: left;
	 padding: 0;
	 list-style: none;
	 z-index: 99;
	}
	ul#dropmenu {
	 width: 774px;
	 display: block;
	 height: 24px;
	 clear: both;
	 border: 1px solid #ccc;
	 text-align: center;
	 background: #fff;
	}
	ul#dropmenu li {
	 position: relative;
	 z-index: 999;
	 float: left;
	}
	ul#dropmenu ul li{
	 float: left;
	 display: block;
	}
	ul#dropmenu ul {
	 /*width: 122px;
	 w\idth: 120px;*/
	 height: auto;
	 position: absolute;
	 text-align: left;
	 left: 0px;
	 display: none;
	 border: solid 1px #ccc;
	}
	/*当鼠标在子菜单和父菜单上时，父菜单的样式*/
	ul#dropmenu li.over a,ul#dropmenu li:hover a{
	 border-color: #ccc;
	 background: #c00;
	 color: #fff;
	}
	/*将子菜单的样式清除*/
	ul#dropmenu li.over ul a,ul#dropmenu li:hover ul a{
	 font-weight: normal;
	 color: #666;
	 background: #fff;;
	}
	/*子菜单的hover样式*/
	ul#dropmenu li.over ul a:hover,ul#dropmenu li:hover ul a:hover{
	 font-weight: normal;
	 color: #cc0000;
	 font-weight: bold;
	 background: #f6f6f6;
	}
	/* Styles for Menu Items */
	ul#dropmenu a {
	 display: block;
	 padding: 0 0 0 10px;
	 width: 106px;
	 w\idth: 96px;
	 color: #666;
	 line-height: 24px;
	}
	ul#dropmenu ul li{
	 width: 110px;
	 border: 0;
	}
	/* End */
	ul#dropmenu ul a
	{
	 /* 透明*/
	 FILTER: progid:DXImageTransform.Microsoft.Alpha(opacity=70);
	 padding: 2px 0px 2px 10px;
	 border: 0;
	 width: 120px;
	 w\idth: 110px;/* Sub Menu Styles */
	}
	ul#dropmenu li:hover ul,ul#dropmenu li.over ul {
	 display: block; /* The magic */
	}
	</style>
	<body>
	<div id="nav">
	<ul id="dropmenu">
	 <li><a href="#">Home</a></li>
	 <li><a href="#">About</a>
	 <ul>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 <li><a href="#">Offices</a></li>
	 </ul>
	 </li>
	 <li><a href="#">Services</a>
	 <ul>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 <li><a href="#">Offices</a></li>
	 </ul>
	 </li>
	 <li><a href="#">Home</a></li>
	 <li><a href="#">About</a>
	 <ul>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 <li><a href="#">Offices</a></li>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 </ul>
	 </li>
	 <li><a href="#">Services</a>
	 <ul>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 <li><a href="#">Offices</a></li>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 <li><a href="#">Offices</a></li>
	 <li><a href="#">History</a></li>
	 <li><a href="#">Team</a></li>
	 <li><a href="#">Drop Down Menu</a></li>
	 </ul>
	 </li>
	 <li><a href="#">Home</a></li>
	</ul>
	</div>
	</body>
	</html>
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