$("#a").mouseenter(function() {
$("#b").show("normal");
});
$("#a").mouseleave(function() {
$("#b").hide("normal");
});
<div id="a" class="a">
<a class="content"><span id="txt">苹果</span></a>
<a class="role_down"></a>
<ul class="b">
<li class="role">栗子</li>
</ul>
</div>
css,display: block;
.a:hover .b {
display:block;
background: #2B7193;
cursor: pointer;
}
.c {
width: 1280px;
margin: auto;
}。
height: 40px; width: 100%; background-color: #2a7193; position: absolute; z-index: 10006; display: none; margin-top: -5px; left: 0; }
<div class="a" id="a"> <div class="btn"></div> <div id="b" class="b"> <div class="c"> <div class="rcontent" id="content"> <a class="dropdown_content"> <span>花生</span> </a> </div> </div> </div> </div>
#a:hover .b{
display: block;
}
<!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>css实现层提示</title>
<style>
div{
clear:both;
margin:5px 0 0 0;
font-size:12px;
line-height:22px;
}
a.alt{
position:relative;
background-color:#fff;
float:left;
width:158px;height:20px;
margin:0 auto;
border:1px solid #eee;
text-align:center;
text-decoration:none;
color:#0066cc;
}
a.alt:hover{
background:#fff;
text-decoration:none;z-index:2;
}
a.alt span{
display:none;
}
a.alt:hover span{
position:absolute;
display:block;
top:-1px;left:158px;
width:130px;height:60px;
border:1px solid #eee;
z-index:1;
}
</style>
</head>
<body>
<div>
<a class='alt' href="/"><span>一个高品质脚本资料网站</span>编程素材网</a>
</div>
<div>
<a class='alt' href="/"><span>给你实用的CSS代码</span>网页特效库</a>
</div>
</body>
</html>
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