網站制作之CSS二級目錄下拉導航效果：
代碼如下：
<!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" content="text/html; charset=gb2312" /> <title>純CSS制作的二級導航特效</title> <style type="text/css"> <!-- *{margin:0;padding:0;border:0;} body { font-family: arial, 宋體, serif; font-size:12px; } #nav { line-height: 24px; list-style-type: none; background:#666; } #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; } #content { clear: left; } --> </style> <script type=text/javascript><!--//--><![CDATA[//><!-- 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> <ul id="nav"> <li><a href="#">產品介紹</a> <ul> <li><a >網奇商城系統</a></li> <li><a >網奇CMS系統</a></li> <li><a >網奇CIPS系統</a></li> <li><a >網奇CWMS系統</a></li> <li><a >網奇客服系統</a></li> <li><a href="#">網奇IOS系統</a></li> </ul> </li> <li><a href="#">服務介紹</a> <ul> <li><a >網奇商城系統服務<