对悬浮窗进一步改进：
用this.className
可以省略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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{
margin:0px;
padding:0px;
}
.aa
{
background-color:#FF0; height: 40px;
width: 100px;
top: 60px;
left: 100px;
position: absolute;
overflow: hidden;
text-align: center;
line-height:40px;
}
.aaa
{
background-color:red; height: 40px;
width: 100px;
top: 60px;
left: 100px;
position: absolute;
overflow:visible;
text-align: center;
line-height:40px;
}
#bb{ height:120px;
width:100px;
top:40px;
left:0px;
position:absolute; }
table{ height:120px;
width:100px;
text-align:center;
vertical-align:middle;
}
.tiyu
{
height:40px;
width:100px;
position:absolute;
overflow:hidden;
left:0px;
top:0px;
}
.zuqiu
{
height:40px;
width:100px;
position:absolute;
overflow:visible;
left:0px;
top:0px;
}
#zuqiu
{
height:40px;
width:100px;
position:absolute;
left:100px;
top:0px;
background-color:#C63;
}
.yule
{
height:40px;
width:100px;
position:absolute;
overflow:hidden;
left:0px;
top:40px;
}
.bagua
{
height:40px;
width:100px;
position:absolute;
overflow:visible;
left:0px;
top:40px;
}
#bagua
{
height:40px;
width:100px;
position:absolute;
left:100px;
top:0px;
background-color:#C63;
}
.guoji
{
height:40px;
width:100px;
position:absolute;
overflow:hidden;
left:0px;
top:80px;
}
.junshi
{
height:40px;
width:100px;
position:absolute;
overflow:visible;
left:0px;
top:80px;
}
#junshi
{
height:40px;
width:100px;
position:absolute;
left:100px;
top:0px;
background-color:#C63;
}
</style>
</head> <body>
<div class="aa" onmousemove="this.className='aaa'" onmouseout="this.className='aa'">新闻动态
<div id="bb">
<table cellpadding="0" cellspacing="0"> <tr bgcolor="#0000FF"> <td height="40" width="100">
<div class="tiyu" onmouseover="this.className='zuqiu'" onmouseout="this.className='tiyu'">体育
<div id="zuqiu">足球</div></div></td> </tr> <tr bgcolor="#FFFF00">
<td height="40" width="100">
<div class="yule" onmousemove="this.className='bagua'" onmouseout="this.className='yule'">娱乐
<div id="bagua">八卦</div></div></td> </tr> <tr bgcolor="#00FFFF">
<td height="40" width="100">
<div class="guoji" onmouseover="this.className='junshi'" onmouseout="this.className='guoji'">国际新闻
<div id="junshi">军事</div></div></td>
</tr>
</table> </div></div> </body>
</html>
结果是一样的：
默认时
鼠标在新闻动态上面时
鼠标在体育上面时：
鼠标在娱乐上面时：
鼠标在国际新闻上面时：