try this code, put this between the head tag:
<script language="JavaScript1.2">
function changeto(highlightcolor){
source=event.srcElement
if (source.tagName=="TR"||source.tagName=="TABLE"

return
while(source.tagName!="TR"

source=source.parentElement
if (source.style.backgroundColor!=highlightcolor&&source.id!="ignore"

source.style.backgroundColor=highlightcolor
}
function changeback(originalcolor){
if (event.fromElement.contains(event.toElement)||source.contains(event.toElement)||source.id=="ignore"

return
if (event.toElement!=source)
source.style.backgroundColor=originalcolor
}
</script>
Note:
If you want to exempt a specific row for a highlight put in the <tr id="ignore">
then on your each of your <tr> tag put this:
onMouseover="changeto('#eff7ff')" onMouseout="changeback('#FFFFcc')"
or if u want more clarifications try this link:
I hope this helps!
bignewbie