[uerter]

if (!isset($_GET['j']) || ($_GET['j']=="") || (!file_exists ("page/$_GET['j'].htm"))){$j=$sys_def_page;}
$filename = "page/$_GET['j'].htm";
$fd = fopen( $filename, "r" );
$text = fread( $fd, filesize( $filename ) );
fclose( $fd );

вот юю вроде так