Row Highlighting and CSS. Grrr.

Seems that if class's are applied to individual TD tags, no matter how i try to implement row highlighing, the TD class will overide the highlighting color.

A simple way to implement row highlighting is:

<TR onmouseover="this.style.backgroundColor='navy';" onmouseout="this.style.backgroundColor='grey';">

however, a TD with a class that set's a DIFFERENT backgroundColor will disregard the TR mouseover.

Any help?