Div+Css为网页两边加阴影

 <div id="shadow">
  <table width="100%" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td align="left"><img src="images/2.jpg" /></td>
      <td>&nbsp;</td>
      <td align="right"><img src="images/1.jpg" /></td>
    </tr>
  </table>
</div>

 

 

对应的css

#shadow{
z-index:-1;      
position:absolute;
left:expression((body.clientWidth-872)/2);              //将其控制在中间
top:268px;
width:872px;
height:50px;
}