public function upload(Request $request)
    {
        //return "xxx";
        $CKEditor = $request->input('CKEditor');
        $funcNum = $request->input('CKEditorFuncNum');
        $message = $url = '';
        if (Input::hasFile('upload')) {
            //return "working";
            $file = Input::file('upload');
            if ($file->isValid()) {
                $filename = rand(1000, 9999) . $file->getClientOriginalName();
                $file->move(public_path() . '/wysiwyg/', $filename);
                $url = url('wysiwyg/' . $filename);
            } else {
                $message = 'An error occurred while uploading the file.';
            }
        } else {
            $message = 'No file uploaded.';
        }
        return '<script>window.parent.CKEDITOR.tools.callFunction(' . $funcNum . ', "' . $url . '", "' . $message . '")</script>';
    }