<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>