引用外部CSS。注意是 href，不是src。
<link href=”img/divcss5.css” rel=”stylesheet” type=”text/css” />
float属性似乎对div更有效
<html>
<head>
<title>标题</title>
<style type="text/css">
body{
padding:0px;
margin:0px;
}
.container{
position:relative;
width:950px;
margin-left:auto;
margin-right:auto;
height:100%;
background-color:#FF0000;
}
.left{
float:left;
background-color:#DDD;
width:80%;
height:100px;
}
.right{
float:right;
background-color:#AAA;
width:20%;
height:100px;
}
</style>
</head>
<body>
<div class="container">
<div class="left">左边</div>
<div class="right">右边</div>
</div>
</body>
</html>
“清除”控件高亮色
-webkit-tap-highlight-color:rgba(0,0,0,0);