<!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></title>
</head>
<body>
<div style="width:400px;height:25px;background-color:Green"></div>
<div style="width:200px;height:40px;float:left;background-color:Navy"></div>
<div style="width:200px;height:40px;background-color:Red;float:left;"></div>
</body>
</html>上面是代码
这个是正常布局这个是我把浏览器宽度调小了,布局就变了
<div style="width:100%;height:25px;background-color:Green"></div>
<div style="width:50%;height:40px;float:left;background-color:Navy"></div>
<div style="width:50%;height:40px;background-color:Red;float:left;"></div>
<div>
http://apps.hi.baidu.com/share/detail/15339470
至于使用JS操作DIV的宽度和高度,不需要给你贴代码了吧?