<style>
.core1 {background-image:url(jajaja.gif);}
.core2 {background-image:url(CoreSanta.gif);}
</style>
</head>
<body>
<table width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td class="core1" onMouseOver="this.className='core2'" onMouseOut="this.className='core1'" height="29"></td>
</tr>
</table>