html 上下左中右布局

<div id="top"></div>

<div id="box">

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

<div id="center"></div>

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

</div>

css规则

#top{

width:1000pxheight:150pxmargin:0 auto

}

#box{

width:1000pxheight:500pxmargin:0 auto

}

#left{

width:240pxheight:500pxfloat:left

}

#right{

width:240pxheight:500pxfloat:right

}

#center{

width:520pxheight:500pxfloat:left

}

<div class="text clearfix" style="text-align:center">

2.<span style="float:right">居右</span><span style="float:left">居左</span>居中

</div>

<table width="" border="0" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">

<tr>

<td bgcolor="#FFFFFF" align="left">居左</td>

<td bgcolor="#FFFFFF" align="center">居中</td>

<td bgcolor="#FFFFFF" align="right">居右</td>

</tr>

</table>

---