a mi no me sirve!!
este es mi pedacito de codigo:
<body onload = "form.aceptar.focus()">
<form name="form" id="form" method="post" action="frameIndex.php" style="position:absolute; left: 80px; top: 100px;">
<table border="2" bordercolor="#000080"><tr><td width="409"><br>
<table border="0" >
<tr>
<td width="120"> <font face="Arial, COMICS SANS MS" size="2" color="#000080"> <b>Usuario:</b></font> </td>
<td width="271"><input type="text" size="40" maxlength="30" name="usuario" id="usuario"></td>
</tr>
<tr >
<td> <font face="Arial, COMICS SANS MS" size="2" color="#000080"><b>Contraseña:</b></font> </td>
<td><input type="password" size="40" maxlength="15" name="contrasena" id="contrasena" ></td>
</tr>
<tr >
<td colspan="2" align="center"> </td>
</tr>
<tr >
<td colspan="2" align="center"><input type="button" name="aceptar" value=" Aceptar " onClick="sesion()"> <input type="RESET" name="cancelar" value="Cancelar">
</td>
</tr>
</table>
</td></tr>
</table>