css-左右布局

一、左边固定，右边自适应的布局

1、左边左浮动，右边加个overflow:hidden;

   #lt{ float: left;width:200px; background: #ff0;}
   #rt{ overflow: hidden; background: #f0f;}

2. 左边左浮动，右边加个margin-left;

   #lt{ float: left; width:200px; background: #ff0;}
   #rt{ margin-left: 200px; background: #f0f;}

3. 左边绝对定位，右边加个margin-left

   #lt{ position: absolute; top:0; left:0; width:200px; background: #ff0;}
   #rt{ margin-left: 200px; background: #f0f;}

4. 左右两边绝对定位，右边加个width,top,left,right

   #lt{ position: absolute; top:0 ; left:0 ;width:200px; background: #ff0;}
   #rt{ position: absolute; top:0 ; left:200px; width: 100% ; rigth:0;background: #f0f;}

二、右边固定，左边自适应的布局

1. 左边左浮动，margin-left负值,右边右浮动

   #lt{float:left; width:100%;background: #00f;margin-right: -200px;}
   #rt{float: right; width: 200px;background: #ff0;}

2. 右边绝对定位，左边margin-right

   #lt{margin-right:200px; background: #00f;}
   #rt{ position: absolute; right:0; top:0; width: 200px;background: #ff0;}

3. 左右两边绝对定位，左边加个width,top,left,right

   #lt{ position: absolute; top:0; left:0; rigth:0; width: 100% ; background: #f0f;}
   #rt{ position: absolute; top:0; left:200px; width:200px; background: #ff0;}