<style type="text/css">
<!--
.style1 {color: #FFFFFF}
-->
</style>
<html>
<head>
<title>Deneme</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9" />
<script language="javascript" type="text/javascript">
<!--
function gizle(){
var x=document.getElementById('birinci').style;
var y=document.getElementById('ikinci').style;
if(x.display=='block'){
x.display='none';
y.display='block';
}
else{
x.display='block';
y.display='none';
}
}
//-->
</script> 
</head>
<body onLoad="setTimeout('gizle()',5000);">

<table width="100%" cellpadding="0" cellspacing="0">
 <tr>
   <td id="birinci" width="100%" align="center" style="display:block;">birinci bu çıksın</td>
 </tr>
 <tr>
  <td id="ikinci" width="100%" align="center" style="display:none;">
ikinci bu çıksın
</td>
 </tr>
</table>

</body>
</html>