div布局1行3列簡單問題，菜鳥求解答，代碼如下

代碼#side1{float:right

妳是要這樣的效果麽

<style type="text/css">

#side{ float:left; width:120px; height:250px; background:#63C;margin:0; }

#side1{float:left;width:120px;height:250px;background:#0F9;margin:0;}

#main{float:left;width:500px; height:250px;background:#C03; margin: 0px 0px; }

#content{width:900px;margin:0}

body{ margin:0}

</style>

<div id="content">

<div id="side">left</div>

<div id="main">mid</div>

<div id="side1">right</div>

</div>