直接上代码
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>自适应宽度，左右两栏固定宽度，中间栏优先加载</title>
<style>
.container{
display:-moz-box;
display:-webkit-box;
}
div{
padding:10px;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
}
.sider_l{
width:250px;
-moz-box-ordinal-group:1;
-webkit-box-ordinal-group:1;
background:limegreen;
}
.middle_content{
-moz-box-flex:1;
-webkit-box-flex:1;
-moz-box-ordinal-group:2;
-webkit-box-ordinal-group:2;
background:lightpink;
}
.sider_r{
width:250px;
-moz-box-ordinal-group:3;
-webkit-box-ordinal-group:3;
background:green;
}
</style>
</head>
<body>
<div class="container">
<div class="middle_content">优先加载主内容区</div>
<div class="sider_l">左边栏</div>
<div class="sider_r">右边栏</div>
</div>
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta
