这是一款比较大气清新的滑动导航菜单，CSS和JavaScript配合完成，鼠标放到一级菜单上，会滑出二级的菜单，兼容性也不错，适合大多数网站使用，用到两张背景图片，请拷贝图片地址下载图片。
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>滑动导航菜单</title> <style> body {margin:25px; font:12px Verdana, Arial, Helvetica} * {padding:0; margin:0} .dropdown {float:left; padding-right:5px} .dropdown dt {width:188px; border:2px solid #9ac1c9; padding:8px; font-weight:bold; cursor:pointer; background:url(images/header.gif)} .dropdown dt:hover {background:url(images/header_over.gif)} .dropdown dd {position:absolute; overflow:hidden; width:208px; display:none; background:#fff; z-index:200; opacity:0} .dropdown ul {width:204px; border:2px solid #9ac1c9; list-style:none; border-top:none} .dropdown li {display:inline} .dropdown a, .dropdown a:active, .dropdown a:visited {display:block; padding:5px; color:#333; text-decoration:none; background:#eaf0f2; width:194px} .dropdown a:hover {background:#d9e1e4; color:#000} .dropdown .underline {border-bottom:1px solid #b9d6dc} </style> <script type="text/javascript"> var DDSPEED = 10; var DDTIMER = 15; function ddMenu(id,d){ var h = document.getElementById(id + '-ddheader'); var c = document.getElementById(id + '-ddcontent'); clearInterval(c.timer); if(d == 1){ clearTimeout(h.timer); if(c.maxh && c.maxh <= c.offsetHeight){return} else if(!c.maxh){ c.style.display = 'block'; c.style.height = 'auto'; c.maxh = c.offsetHeight; c.style.height = '0px'; } c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER); }else{ h.timer = setTimeout(function(){ddCollapse(c)},50); } } function ddCollapse(c){ c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER); } function cancelHide(id){ var h = document.getElementById(id + '-ddheader'); var c = document.getElementById(id + '-ddcontent'); clearTimeout(h.timer); clearInterval(c.timer); if(c.offsetHeight < c.maxh){ c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER); } } function ddSlide(c,d){ var currh = c.offsetHeight; var dist; if(d == 1){ dist = (Math.round((c.maxh - currh) / DDSPEED)); }else{ dist = (Math.round(currh / DDSPEED)); } if(dist <= 1 && d == 1){ dist = 1; } c.style.height = currh + (dist * d) + 'px'; c.style.opacity = currh / c.maxh; c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')'; if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){ clearInterval(c.timer); } } </script> </head> <body> <dl> <dt>源码下载</dt> <dd> <ul> <li><a href="#">最新源码</a></li> <li><a href="#">下载排行</a></li> <li><a href="#">脚本资源</a></li> <li><a href="#">Ajax实例</a></li> </ul> </dd> </dl> <dl> <dt>网页特效</dt> <dd> <ul> <li><a href="#">菜单导航</a></li> <li><a href="#">层和布局</a></li> <li><a href="#">图片特效</a></li> </ul> </dd> </dl> </body> </html>