<!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">
<html>
<head>
<title>CSS和HTMLQAQ</title>
*{
margin: 0;
padding: 0;
}
.header{
widths: 1000px;
/*width: 100%;*/
height: 50px;
background-color: white;
margin: 0 auto;
}
.header2{
widths: 1000px;
/*width: 100%;*/
height: 80px;
background-color: white;
margin: 0 auto;
}
.content{
widths: 1000px;
height: 500px;
background-color: white;
margin: 10px auto;
}
.left{
width: 200px;
height: 80%;
background-color: white;
float: left;
}
.center{
width: 850px;
height: 100%;
background-color: white;
float: left;
margin: 0 10px;
}
.up{
width: 1100px;
height: 70%;
background-color: darkblue;
}
.footer{
widths: 1000px;
height: 50px;
background-color: white;
margin: 0 auto;
}
</style>
</head>
<body>
<!-- 头 -->
</div>
</div>
<!-- 主体内容 -->
</div>
</div>
</div>
</div>
</div>
<!-- 底部信息 -->
</div>
</body>
</html>
