1. 引用外部.css文件 <link href="mobi_css/bill_control.css" rel="stylesheet" type="text/css"/>

2. id用#号，class 用.

3.css横向布局 float:left; position:relative;

4.div文字纵向居中 text-align: center;

height: 50px;

line-height: 50px;

5.隐藏div    document.getElementById("content_data_div_poster_1").style.visibility="hidden";//隐藏

6.引用外部js  <script type="text/javascript" src="mobi_js/bill_control.js"></script> 

7.div横向布局 

　　#content_left_navigation_bars_div{

width: auto;

float:left;

}

#content_data_div_poster_1{

width: auto;

background-color: white;

float:left;

margin-left: 30px;

margin-top: 30px;

}