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下拉菜单总是出不来asp_html/css_WEB-ITnose

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2016-06-24 11:29:151086browse


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<script> <br />$(function() { <br /> $('li').has('ul').mouseover(function(){ <br /> $(this).children('ul').css('visibility','visible'); <br /> }).mouseout(function(){ <br /> $(this).children('ul').css('visibility','hidden'); <br /> }); <br />}); <br /></script>







            
            
            
 
            
                

                                
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回复讨论(解决方案)

下拉菜单不用JS的，纯CSS完全可以实现！你的定位有问题！ 

<!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><%=stitle&title%></title><meta name="keywords" content="<%=keywords%>" /><meta name="description" content="<%=descriptions%>" /><script type="text/javascript" src="js/jquery-1.8.0.min.js"></script><script type="text/javascript" src="js/jquery.jslides.js"></script><link rel="stylesheet" type="text/css" href="css/jquery.jslides.css" media="screen" /><link href="common/common.css" rel="stylesheet" type="text/css" /><style>#menu, #menu ul {margin: 0;padding: 0;list-style: none;}#menu {zoom: 1;}#menu li {float: left;position: relative;line-height:20px; margin-right:10px;}#menu ul {position: absolute;top: 20px;left:0px;z-index: 1;background: #fff;}#menu li ul{display:none;}#menu li:hover ul {opacity: 1;display:block;margin: 0;}</style></head><body><!--头部--><div class="top">                                    <div class="nav">                             <ul id="menu">                            <li class="float_left"><a href="index.asp">首  页</a></li>                            <li class="float_left"><a href="about.asp">关于我们</a></li>                            <li class="float_left"><a href="news.asp">新闻</a></li>                            <li class="float_left"><a href="PE_BRAID_LINE.asp">PE编织线</a>								<ul>								<li><a>sa11111111111df</a></li>								<li><a>sa222222222222222df</a></li>								<li><a>sa33333333333df</a></li>								  </ul>								  </li>                            <li class="float_left"><a href="fluorocarbon.asp">碳素线</a></li>                            <li class="float_left"><a href="NEEDLES.asp">配件</a></li>                            <li class="float_left"><a href="Monofilament.asp">尼龙线</a></li>                            <li class="float_left"><a href="contact.asp">联系我们</a></li>                </ul>                            </div>                                    </div><!--/头部--></body></html>

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