CSS实现三栏布局的四种方法示例

//CSS reset
body,html {
    height:100%;
    padding: 0;
    margin: 0
}
//左栏左浮动
.left {
    background: red;
    width: 100px;
    float: left;
    height: 100%;
}
//中间自适应
.main {
    background: blue;
    height: 100%;
    margin:0px 200px 0px 100px;
}
//右栏右浮动
.right {
    background: red;
    width: 200px;
    float: right;
    height: 100%;
}