Hello. I´m absolutely new as web designer for mobile phones and I have some doubts how to start.

First I need is know how to force the download of a file with extension .py, instead of open it with the browser as a textpage.
I have that code in PHP that works in IE at PC, but not in my NokiaE65. I´d like to know why.

Thank you very much

PHP Code:
= array("py"); // extensiones que permitiremos
$f $_GET["f"];
"No puedes navegar por otros directorios");
$ftmp explode(".",$f);
$fExt strtolower($ftmp[count($ftmp)-1]);
"<b>ERROR!</b> no es posible descargar archivos con la extensión $fExt");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"$f\"\n");