public function uploadAction()
    {
        //action body
        if (!empty($_FILES)) {
            $tempFile = $_FILES['Filedata']['tmp_name'];
            $targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
            $targetFile =  str_replace('//','/',$targetPath) . $_FILES['Filedata']['name'];
            
            // $fileTypes  = str_replace('*.','',$_REQUEST['fileext']);
            // $fileTypes  = str_replace(';','|',$fileTypes);
            // $typesArray = split('\|',$fileTypes);
            // $fileParts  = pathinfo($_FILES['Filedata']['name']);
            
            // if (in_array($fileParts['extension'],$typesArray)) {
                // Uncomment the following line if you want to make the directory if it doesn't exist
                // mkdir(str_replace('//','/',$targetPath), 0755, true);
                
                move_uploaded_file($tempFile,$targetFile);
                echo str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);
            // } else {
            //     echo 'Invalid file type.';
            // }
        }
    }

        <script type="text/javascript">
        // <![CDATA[
            $(document).ready(function() {
                $('#file_upload').uploadify({
                    'uploader'  : '/uploadify/uploadify.swf',
                    'script'    : '<?php echo $this->baseUrl().'/upload'; ?>',
                    'cancelImg' : '/uploadify/cancel.png',
                    'folder'    : '/../../../uploads',
                    'auto'      : true
                });
            });
        // ]]>
        </script>

        <script type="text/javascript">
        // <![CDATA[
            $(document).ready(function() {
                $('#file_upload').uploadify({
                    'uploader'  : '/uploadify/uploadify.swf',
                    'script'    : '/uploadify/uploadify.php',
                    'cancelImg' : '/uploadify/cancel.png',
                    'folder'    : '/uploads',
                    'auto'      : true
                });
            });
        // ]]>
        </script>