CSS
.rol_1{
background-color:#FFFFFF}
.rol_2{
background-color:#CCCCCC}
.rol_Hover{
background-color:#FFFF99}
PHP Script On <TR>
<?php do { ?>
<tr class=”<?php echo ($ac_sw1++%2==0)?”rol_1″:”rol_2″; ?>” onmouseover=”this.oldClassName = this.className; this.className=’rol_Hover’;” onmouseout=”this.className = this.oldClassName;”><td>loop</td>
</tr>
<?php } while ($row_travel_schedule = mysql_fetch_assoc($schedule)); ?>