$("#custom_file_uploadIDCard").uploadify({
            'uploader': '/Scripts/Uploadify/uploadify.swf',
            'script': '/ashx/UploadFiles.ashx',
            'cancelImg': '/Scripts/Uploadify/uploadify-cancel.png',
            'folder': '/',
            'queueSizeLimit': 1,
            'simUploadLimit': 1,
            'sizeLimit ': 1024 * 1024 * 20,
            'auto': true,
            'fileExt': '*.jpg;*.gif;*.jpeg;',
            'fileDesc': 'Image Files (.jpg, .gif, .jpeg)',
            'queueID': 'fileQueue',
            'width': 40,
            'height': 24,
            'buttonText': '选择',
            'wmode': 'opaque',
            'hideButton': false,
            'onOpen': function (event, ID, fileObj) {
                alert("123");
            },
            'onComplete': function (event, queueId, fileObj, response, data) {
            }
        });