CSS : 리스트 항목에 mouseover시 색상 변하게 처리

<table border=1 width=740 cellpadding=0 cellspacing=0 bordercolor=#CCCCFF bordercolorlight='silver' bordercolordark='#FFFFFF' bgcolor='#F8F8F8'>
<tr onmouseover="this.style.background='#E3E3E3'" onmouseout="this.style.background=''">
<td width=50 align=center>23</td>
</tr>
<tr onmouseover="this.style.background='#E3E3E3'" onmouseout="this.style.background=''">
<td width=50 align=center>23</td>
</tr>
<tr onmouseover="this.style.background='#E3E3E3'" onmouseout="this.style.background=''">
<td width=50 align=center>23</td>
</tr>
<tr onmouseover="this.style.background='#E3E3E3'" onmouseout="this.style.background=''">
<td width=50 align=center>23</td>
</tr>
</table>