// DETECT AJAX
$ajaxsubmit = false;

    if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest')
    {
        $ajaxsubmit = true;
    }


// CURRENTLY TASK:
switch ($page) {
        case "project":
            require_once('includes/users/users.php');
            if(isset($_POST['verzenden']) && $action == "validate"){
                $content = updateProjectField($id);
            }else{
                $content = details($action,$id);
                // Checken of de upload button is clicked:
                if(isset($_POST['btn'])){

                        generateFileUpload($_FILES);  // >>> THIS ONE SHOULD BE EXECUTED WITH AJAX
                }
            }
            break;