Change class on MouseOver

I'm trying to change the class of a cell when you mouseover, something like this:

onMouseOver="class='c1bkg'" onMouseOut="class='c2bkg'"

Is something like this possible?

Or as an alternative, can the whole lot be placed in the css file, and given a class of it's own???

<TABLE WIDTH="200" BORDER="1" CELLSPACING="0" CELLPADDING="0" HEIGHT="200" ALIGN="CENTER" onMouseOver="this.className='t2'" onMouseOut="this.className='t1'" CLASS="t1" >
<TR>
<TD>&nbsp;</TD>
</TR>
</TABLE>

You were close ;).

thanks man :)