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:
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。
运行效果截图如下:
在线演示地址如下:
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.gif) no-repeat right center;}
#menu li a.fly {background:transparent url(images/white-right.gif) no-repeat right center;}
#menu li.left ul a.fly {background:transparent url(images/white-left.gif) 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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