Es en serio la pregunta?
Código PHP:
<?php if(! isset($_COOKIE['loggedin'])) { ?>
<form action="iniciando.php" method="post" onsubmit="return validate()">
<table width="162" height="121" border="0">
<tr>
<td width="59" height="30">Usuario: </td>
<td width="120"><input type="text" name="username" size="15" /></td>
</tr>
<tr>
<td height="32">Contraseña:</td>
<td><input type="password" name="password" size="15" /></td>
</tr>
<tr>
<td><input name="submit" type="submit" value="Iniciar" /></td>
<td> </td>
</tr>
<tr>
<td> </td>
</tr>
<tr> </tr>
</table>
<p>
</p>
</form>
<?php } ?>