这是一款JavaScript横向滑出的多级菜单，只用鼠标放上就可以动画出现二级菜单，整体设计精美，大气，博客上也可以用哦。
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>JavaScript横向滑出的多级菜单</title> <style> * {padding:0; margin:0} body {font:12px Verdana, Arial, Helvetica} #wrapper {width:750px; padding:25px; margin:0 auto} #leftcolumn {float:left; width:225px} #rightcolumn {float:left; width:525px} .dropdown {display:block; position:relative} .dropdown dt {width:188px; border:2px solid #9ac1c9; padding:8px; font-weight:bold; cursor:pointer; background:url(images/header.gif)} .dropdown .upperdd {border-bottom:none} .dropdown dt:hover {background:url(images/header_over.gif)} .dropdown dd {position:absolute; top:0; overflow:hidden; width:208px; display:none; background:#fff; opacity:0} .dropdown ul {width:204px; border:2px solid #9ac1c9; list-style: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; var OFFSET = -2; var ZINT = 100; 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); c.style.display = 'block'; if(c.maxh && c.maxh <= c.offsetHeight){return} else if(!c.maxh){ c.style.left = (h.offsetWidth + OFFSET) + 'px'; c.style.height = 'auto'; c.maxh = c.offsetHeight; c.style.height = '0px'; } ZINT = ZINT + 1; c.style.zIndex = ZINT; 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 > (c.maxh - 2) && d == 1){ clearInterval(c.timer); }else if(dist < 1 && d != 1){ clearInterval(c.timer); c.style.display = 'none'; } } </script> </head> <body> <div> <div> <dl> <dt>我们首页</dt> <dd> <ul> <li><a href="#">脚本主页</a></li> <li><a href="#">网页特效</a></li> <li><a href="#">脚本下载</a></li> </ul> </dd> </dl> <dl> <dt>网站导航</dt> <dd> <ul> <li><a href="#">ASP</a></li> <li><a href="#">PHP</a></li> <li><a href="#">.NET</a></li> <li><a href="#">网站留言</a></li> </ul> </dd> </dl> <dl> <dt>最新下载</dt> </dl> <dl> <dt>欢迎回来</dt> <dd> <ul> <li><a href="#">欢迎再来</a></li> <li><a href="#">慢走，不送</a></li> </ul> </dd> </dl> </div> </div> </body> </html>