用ie打开javascript加载的background有残留，请问如何解决？

Question

<tr align="center"><td class="tx-l" id="T1" onclick="GetClickInfo(this.id);"background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F1"></strong></td><td class="tx-l" id="T2" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F2"></strong></td><td class="tx-l" id="T3" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F3"></strong></td><td class="tx-l" id="T4" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F4"></strong></td>
<td class="tx-l" id="T5" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F5"></strong></td>
<td class="tx-l" id="T6" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F6"></strong></td>
<td class="tx-l" id="T7" onclick="GetClickInfo(this.id);" background="../img/cal_bg03.gif"
height="49"><strong class="tx-gray" id="F7"></strong></td>
</tr>

用Id.style.backgroundImage = "url(../img/cal_bg03.gif)";修改background再用ie打开，出现残留图片，background无法全部设置上去, 用id.style.background也出现同样情况。

Answer 1

应该这么用　
 document.all.id.backgroup='img/cal_bg03.gif';