这里使用jQuery实现简洁下拉菜单导航效果，代码规范，兼容性方面:支持 IE6+, Firefox 1.5+, Opera 8+, Safari 3+, Chrome 0.2+。简洁明快的jquery网站菜单，请参阅代码。
运行效果截图如下：
在线演示地址如下：
具体代码如下：
<!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>jQuery下拉菜单导航</title> <style> body{background: #6595A3;padding: 0 20px} .clear{clear: both;overflow: hidden;height: 0} #all{width: 80%;min-width: 650px;margin: 40px auto 0 auto;background: #FCFFED;padding: 20px 35px} h1{font: 26px tahoma, arial;color: #324143} p{font: 12px tahoma, arial;color: #171F26;margin-bottom: 25px} a{color: #324143} #copyright{width: 80%;min-width: 650px;margin: 0 auto;padding: 20px 35px;background: #B6C28B;font: 12px tahoma, arial;color: #324143} #copyright a{color: #324143} #copyright a: hover{color: #171F26} #jsddm{margin: 0;padding: 0} #jsddm li{float: left;list-style: none;font: 12px Tahoma, Arial} #jsddm li a{display: block;background: #324143;padding: 5px 12px;text-decoration: none;border-right: 1px solid white;width: 70px;color: #EAFFED;white-space: nowrap} #jsddm li a: hover{background: #24313C} #jsddm li ul{margin: 0;padding: 0;position: absolute;visibility: hidden;border-top: 1px solid white} #jsddm li ul li{float: none;display: inline} #jsddm li ul li a{width: auto;background: #A9C251;color: #24313C} #jsddm li ul li a: hover{background: #8EA344} </style> </head> <body> <div> <h1>jQuery简洁下拉菜单导航</h1> <p>简洁明快的jquery网站菜单，请参阅代码.</p> <script src="https://www.jb51.net/jquery-1.6.2.min.js" type="text/javascript"></script> <script type="text/javascript"> var timeout= 500; var closetimer= 0; var ddmenuitem= 0; function jsddm_open() { jsddm_canceltimer(); jsddm_close(); ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');} function jsddm_close() { if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');} function jsddm_timer() { closetimer = window.setTimeout(jsddm_close, timeout);} function jsddm_canceltimer() { if(closetimer) { window.clearTimeout(closetimer); closetimer = null;}} $(document).ready(function() { $('#jsddm > li').bind('mouseover', jsddm_open); $('#jsddm > li').bind('mouseout', jsddm_timer);}); document.onclick = jsddm_close; </script> </p> <ul> <li><a href="#">JavaScript</a> <ul> <li><a href="#">下拉菜单</a></li> <li><a href="#">jQuery插件</a></li> <li><a href="#">Ajax Navigation</a></li> </ul> </li> <li><a href="#">Effect</a> <ul> <li><a href="#">幻灯切换</a></li> <li><a href="#">Fade Effect</a></li> <li><a href="#">Opacity Mode</a></li> <li><a href="#">下滑阴影</a></li> <li><a href="#">Semitransparent</a></li> </ul> </li> <li><a href="#">Navigation</a> <ul> <li><a href="#">Slide Effect</a></li> <li><a href="#">Fade Effect</a></li> <li><a href="#">Drop Shadow</a></li> </ul> </li> <li><a href="#">HTML/CSS</a> <ul> <li><a href="#">图片特效</a></li> <li><a href="#">Opacity Mode</a></li> <li><a href="#">静态网页</a></li> </ul> </li> <li><a href="#" target="_blank">Help</a></li> </ul> <div> </div> <br> <p><b>兼容:</b> IE6+, Firefox 1.5+, Opera 8+, Safari 3+, Chrome 0.2+<br> </div> </div> </body> </html>