web前端|js教程
jQuery,多级下拉菜单
web前端-js教程
本文实例讲述了jQuery实现的多级下拉菜单效果代码。分享给大家供大家参考。具体如下：
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这是一款jQuery多级下拉菜单，在支持html5的浏览器中测试你会发现本菜单很智能，会自动判断浏览器边界来改变下拉菜单的显示方向，在ie下没发现此效果。整体上来看，和Windows系统的“经典”主题时的菜单风格特别相似，配合图片，整体效果还是相当有专业水准的。
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运行效果截图如下：
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在线演示地址如下：
/js//jquery-nlevel-nav-menu-style-codes/
具体代码如下：
jQuery多级下拉菜单$(document).ready(function(){$(#menu li).hover(function(){ $(this).find(ul:first).css({visibility: "visible",display: "none"}).fadeIn(400); // effect 1 },function(){ $(this).find(ul:first).css({visibility: "hidden"}); });});body{background:#eee;font-family:Verdana, Helvetica, Arial, sans-serif;margin:0;padding:0}.examples{background:#FFF;width:800px;font-size:80%;border:1px #000 solid;margin:3.5em auto 2em;padding:1em 2em 2em}#menu {width:750px; height:531px; background:url(images/snowboard.jpg); text-align:center; margin:0 auto;}#menu ul {margin:0; padding:0; list-style:none; white-space:nowrap; text-align:left; background:#ccccd0; border:1px solid #333; border-color:#eee #555 #222 #fff;}#menu ul {display:inline-block;}#menu li {margin:0; padding:0; list-style:none;}#menu li {display:inline-block; display:inline;}#menu ul ul {position:absolute; left:-9999px;}#menu ul.level1 {margin:0 auto;}#menu ul.level1 li.level1-li {float:left; display:block; position:relative;}#menu b {position:absolute;}#menu a {display:block; font:normal 11px verdana,arial,sans-serif; color:#000; line-height:25px; text-decoration:none;padding:0 20px;}#menu ul.level1 li.level1-li a.level1-a {float:left;}#menu ul li:hover > ul {visibility:visible; left:0; top:21px;}#menu ul ul li:hover > ul {visibility:visible; left:100%; top:auto; margin-top:-25px; margin-left:-4px;}#menu li.left:hover > ul {visibility:visible; left:auto; right:0; top:25px;}#menu li.left ul li:hover > ul {visibility:visible; left:auto; right:100%; top:auto; margin-top:-25px; margin-right:-4px;}#menu a:hover ul {left:0; top:23px;}#menu li.left a:hover ul {left:auto; right:-1px; top:23px;}#menu li.left ul a {text-align:right;}#menu a:hover a:hover ul,#menu a:hover a:hover a:hover ul {left:100%; visibility:visible;}#menu li.left a:hover a:hover ul,#menu li.left a:hover a:hover a:hover ul {left:auto; right:0; visibility:visible;}#menu a:hover ul ul,#menu a:hover a:hover ul ul {left:-9999px;}#menu li.left a:hover ul ul,#menu li.left a:hover a:hover ul ul {left:-9999px;}#menu li a.drop {background:transparent url(images/white-down.jpg) no-repeat right center;}#menu li a.fly {background:transparent url(images/white-right.jpg) no-repeat right center;}#menu li.left ul a.fly {background:transparent url(images/white-left.jpg) no-repeat left center;}#menu li a:hover,#menu li a.fly:hover {color:#c60; background-color:#c0c0c8;}#menu li:hover > a,#menu ul li:hover > a.fly {color:#c60; background-color:#c0c0c8;}#menu table {position:absolute; height:0; width:0; left:0; border-collapse:collapse; margin-top:-6px;}#menu table table {position:absolute; left:99%; height:0; width:0; border-collapse:collapse; margin-top:-30px; margin-left:-4px;}#menu li.left table {position:absolute; height:0; width:0; left:auto; right:0; border-collapse:collapse; margin-top:-4px;}#menu li.left table table {position:absolute; left:auto; right:100%; height:0; width:0; border-collapse:collapse; margin-top:-30px; margin-right:-4px;}
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