动态修改表格背景

<td onmouseover="over(this);" onmouseout="out(this);">test</td>
<script language="javascript">
var oldBackgroundColor,oldForeColor;
function over(oTR){
  oldBackgroundColor = oTR.style.backgroundColor;
  oldForeColor = oTR.style.color;
  oTR.style.backgroundColor='#FF0';
  oTR.style.color='#F60'"
}
function out(oTR){
  oTR.style.backgroundColor=oldBackgroundColor;
  oTR.style.color=oldForeColor;
}
</script>