steam free license adder looper

(function(){
    if( location.hostname !== 'store.steampowered.com' ){
        alert( 'Run this code on the Steam Store!' );
        return;
    }else if( typeof jQuery !== 'function' ){
        ShowAlertDialog( 'Fail', 'This page has no jQuery, try homepage.' );
        return;
    }else if( document.getElementById( 'header_notification_area' ) === null ){
        ShowAlertDialog( 'Fail', 'You have to be logged in.' );
        return;
    }

    var pkgstart = 0,
        pkgend = 5000,
        loaded = 0,
        total = pkgend - pkgstart,
        modal = ShowBlockingWaitDialog( 'Executing...', 'Please wait until all requests finish.' );

    for( var i = pkgstart; i <= pkgend; i++ ){
        jQuery.post(
            '//store.steampowered.com/checkout/addfreelicense',
            {
                action: 'add_to_cart',
                sessionid: g_sessionID,
                subid: i
            },
            function( data )
            {
                loaded++;
                modal.Dismiss();
                if( loaded === total ){
                    ShowAlertDialog( 'All done!', 'Enjoy.' );
                }else{
                    modal = ShowBlockingWaitDialog( 'Executing...', 'Added license ' + loaded + pkgstart + '/' + pkgend );
                }
            }
        );
    }
}());