如何用JAVASCRIPT实现单元格背景图片的切换？

Question

部分代码如下：<table border="0" align="center" width="760px" valign="bottom">
   <tr>
<td background="/images/01.gif" onclick="formSubmit(this)">
   <bean:message key="prompt.message.japanese"/>
</td>
   </tr>
</table><script>
var objImageMenu5= new Image();
objImageMenu5.src='/images/menu05.gif';
function formSubmit(obj){
   obj.style.background.src=objImageMenu5.src;
}
</script>

Answer 1

style.backgroundImage = "url(../1.jpg)";

Answer 2

<div id="div1" style="background-image:url(http://zi.csdn.net/microsoft468_60.gif);height:100">
aaaaaaaaaaaaaaaaaa
</div>
<input name=button1 type=button value="变换" onclick=show()>
<script language=javascript>
function show()
{
document.getElementById("div1").style.background="url(http://zi.csdn.net/qihoo_300_60.gif)"
}
</script>