diff --git a/public/assets/js/backend/oa/doc.js b/public/assets/js/backend/oa/doc.js
index 64fb8d0..13a68c8 100644
--- a/public/assets/js/backend/oa/doc.js
+++ b/public/assets/js/backend/oa/doc.js
@@ -50,7 +50,7 @@ define(['jquery', 'bootstrap', 'backend', 'table', 'form'], function ($, undefin
             $(document).on('click', '.btn-preview', function (e) {
                 e.preventDefault();
                 var fileType = $(this).data('type'); // 自动从 data-type 获取，比如 pdf, jpg, doc
-                var url = $(this).attr('href');
+                var url = $(this).attr('url');
 
                 if (fileType === 'pdf') {
                     Layer.open({