本文實(shí)例講述了jQuery實(shí)現(xiàn)的精美平滑二級(jí)下拉菜單效果。分享給大家供大家參考，具體如下：
這是一款jQurey實(shí)現(xiàn)的向下二級(jí)導(dǎo)航菜單效果。效果非常不錯(cuò)，由上到下平滑延伸，給人的感覺(jué)協(xié)調(diào)唯美！js與html代碼結(jié)構(gòu)簡(jiǎn)單明了，便于使用與修改！
運(yùn)行效果截圖如下：
具體代碼如下：
<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery實(shí)現(xiàn)精美二級(jí)菜單——js特效大全</title>
<style type="text/css">
* { margin:0; padding:0; }
body { font:12px/normal Arial, Helvetica, sans-serif; }
ul, ol { list-style:none; }
a img { border:none; }
#content { width:800px; margin:30px auto; }
.main_nav { width:100%; height:30px; }
.main_nav ul li { float:left; width:190px; height:30px; border-right:1px solid #666; position:relative; }
.main_nav ul li a { display:block; height:30px; line-height:30px; text-align:center; background:#333; color:#ccc; text-decoration:none; }
.main_nav ul li dl { position:absolute; left:0; top:30px; width:190px; display:none; }
.main_nav ul li dl dd { height:31px; }
.main_nav ul li dl dd a { display:block; height:30px; line-height:30px; text-align:center; color:white; background:#555; border-bottom:1px solid #666; }
.main_nav ul li dl dd a:hover { background:#333; color:#ccc; }
.click { margin-top:200px; }
</style>
</head>
<body>
<div id="content">
<div>
<ul>
<li><a href="#">網(wǎng)頁(yè)特效</a>
<dl>
<dd><a href="#">網(wǎng)頁(yè)特效</a></dd>
<dd><a href="#">網(wǎng)頁(yè)特效</a></dd>
<dd><a href="#">網(wǎng)頁(yè)特效</a></dd>
<dd><a href="#">網(wǎng)頁(yè)特效 </a></dd>
<dd><a href="#">網(wǎng)頁(yè)特效</a></dd>
</dl>
</li>
<li><a href="#">網(wǎng)頁(yè)設(shè)計(jì)</a>
<dl>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì)</a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì)</a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì)</a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì) </a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì)</a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì) </a></dd>
<dd><a href="#">網(wǎng)頁(yè)設(shè)計(jì) </a></dd>
</dl>
</li>
<li><a href="#">網(wǎng)頁(yè)制作</a>
<dl>
<dd><a href="#">網(wǎng)頁(yè)制作</a></dd>
<dd><a href="#">網(wǎng)頁(yè)制作</a></dd>
<dd><a href="#">網(wǎng)頁(yè)制作</a></dd>
<dd><a href="#">網(wǎng)頁(yè)制作 </a></dd>
<dd><a href="#">網(wǎng)頁(yè)制作</a></dd>
</dl>
</li>
<li><a href="#">網(wǎng)站優(yōu)化</a>
<dl>
<dd><a href="#">網(wǎng)站優(yōu)化</a></dd>
<dd><a href="#">網(wǎng)站優(yōu)化</a></dd>
<dd><a href="#">網(wǎng)站優(yōu)化</a></dd>
<dd><a href="#">網(wǎng)站優(yōu)化 </a></dd>
<dd><a href="#">網(wǎng)站優(yōu)化</a></dd>
</dl>
</li>
</ul>
</div>
</div>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(".hover ul li").hover(function(){
$(this).children("dl").slideDown(300)
}, function(){
$(this).children("dl").slideUp(100)
});
</script>
</body>
</html>
希望本文所述對(duì)大家jQuery程序設(shè)計(jì)有所幫助。