function googlemaps_markup( $content ) {
    return preg_replace( '|\[googlemaps[ =](.+?)]|ie', 'googlemaps_src( "$1" )',
 $content );
}
function googlemaps_src( $params ) {
    if( faux_faux( ) )
        return '[googlemaps]';

    $params = str_replace( '&', '&', $params );
    parse_str( $params, $arg );

    $url = 'http://maps.google.com/?';
    $url .= "ie={$arg['ie']}";
    $url .= "&ll={$arg['ll']}";
    $url .= "&spn={$arg['spn']}";
    $url .= "&z={$arg['z']}";
    $url .= "&output=embed";
    $url .= "&s={$arg['s']}";

    $link_url = preg_replace( '|output=embed|', 'source=embed', $url );

    $iframe = '<iframe width="425" height="350" frameborder="0" scrolling="no" m
arginheight="0" marginwidth="0" src="' . $url . '"></iframe><br /><small><a href
="' . $link_url . '" style="color:#0000FF;text-align:left">View Larger Map</a></
small>';

    return $iframe;
}
add_filter( 'the_content', 'googlemaps_markup' );