这个好使 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript">function shows() { var f=document.getElementById("f"); f.style.display='block'; } function closed() { var f=document.getElementById("f");
<style>
.Nav {}
.Nav li{
float:left;
display:block;
position:relative;
}
.Nav a{
float:left;
display:block;
position:relative;
padding:2px 10px 2px 10px;
font-size:13px;
text-decoration: none;
}
.Nav li a:hover
{
color:#ffffff;
background:#ea0000;
}
.Nav li table {
display:none;
border-collapse:collapse;
}
.Nav li:hover table, .Nav a:hover table {
display:block;
position:absolute;
top:18px;
left:0;
background:#ea0000;
}
.Nav li:hover table a, .Nav a:hover table a {
float:none;
background:#f2f2f2;
color:#000;
width:120px;
border-bottom:1px solid #fff;
}
.Nav li:hover table a:hover, .Nav a:hover table a:hover {
background:#565656;
color:#fff;
}
</style><div class='Nav'>
<li>
<a href='#'>产品
<table><tr><td>
<a href='#1'>内容管理系统</a>
<a href='#2'>竞争情报系统</a>
</td></tr></table>
</a>
</li>
<li>
<a href='#'>客户服务
<table><tr><td>
<a href='#1'>技术支持</a>
<a href='#2'>留言反馈</a>
<a href='#3'>在线帮助</a>
</td></tr></table>
</a>
</li>
</div>网上拿的,没有用onmouseover,用了伪类(a:hover)
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">function shows()
{
var f=document.getElementById("f");
f.style.display='block';
}
function closed()
{
var f=document.getElementById("f");
f.style.display='none';
}
</script>
<style type="text/css">
#f{
width:300px;
height:200px;
background: #FF0;
display:none;
letf:500px;
font-size:30px;
}
#m{
width:200px;
height:40px;
background: #F00;
font-size:30px;
}</style>
</head>
<body>
<div id="m" onmouseover="shows()" onmouseout="closed()">测试一下</div>
<div id="f">显示层</div></body>
</html>
#float { position:absolute; display:none; }
</style><div id="test">鼠标移过来瞧一瞧
<div id="float">我是浮动div</div>
</div><script type="text/javascript">
$("#test").mouseover(function() {
$("#float").show();
}).mousemove(function() {
$("#float").css({top:event.clientY+10, left:event.clientX+20})
}).mouseleave(function() {
$("#float").hide();
});
</script>
<!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>
<title>鼠标悬停显示提示信息窗口</title>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<style type="text/css">
.contact{width:100px;height:15px;margin:20px 0 0 50px;background-color:#CCCCCC;text-align:center;}
.us{display:none;width:300px;height:40px;padding:10px;position:relative;top:0px;left:50px;background-color:#0099FF;}
</style>
<script src="http://www.codefans.net/ajaxjs/jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".contact").mouseover(function(){
$(".us").show("slow");
$(".contact").mouseout(function(){
$(".us").hide("slow");
});
});
})
</script>
</head>
<body>
<div class="contact">联系我们</div>
<div class="us">显示内容<br>显示内容描述</div>
</body>
</html>