テーブルセルの背景色を、マウスオーバー/アウト で変化。

<script language="JavaScript" type="text/JavaScript">
<!--
function bgColorChanger(o,hex){
 o.style.backgroundColor = hex;
}
//-->
</script>

<body>
 <table>
  <tr>
   <td onMouseOver="bgColorChanger(this,'#82c3d5');" onMouseOut="bgColorChanger(this,'');">uuh</td>
   <td onMouseOver="bgColorChanger(this,'#cfcab4');" onMouseOut="bgColorChanger(this,'');">yah</td>
   <td onMouseOver="bgColorChanger(this,'#afc032');" onMouseOut="bgColorChanger(this,'');">tah</td>
  </tr>
 </table>
</body>
uuh yah tah