div+css背景层适应的问题
<!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 " xml:lang= "zh-CN " lang= "zh-CN ">
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=gb2312 " />
<title> </title>
<link href= "css.css " rel= "stylesheet " type= "text/css " media= "all " />
</head>
<style>
#n1 {background:#eeeeee;width:300px}
#n2 {height:400px;width:300px}
</style>
<body>
<div id= "n1 ">
<div id= "n2 ">
s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p> s <p>
</div>
</div>
</body>
</html>
因为n2层设计时需设定高度，但当内容超过设定高度时！
在IE中n1层能适应n2层高度，FF就不能了，如何解决！？
[解决办法]
针对ff，设定min-height，对ie设定height
