<script language="Javascript">
function td_click(div_id,tdbz)
{
var ggbz=document.all('ggbz')
if (div_id.style.display=='block') //如果展开的
{
div_id.style.display='none' ; //设为隐藏
tdbz.style.backgroundImage='url(../../images/tdjia.gif)'; //图片改为加号图片
}
else // 否则就展开
{
div_id.style.display='block';
tdbz.style.backgroundImage='url(../../images/tajian.gif)';
}
}
</script>
<td id="yonghuzong" class="listcell" colspan="2"
onclick="td_click(document.all('gonggong'),document.all('ggbz'))" style="cursor: hand; height: 20px" valign="middle">