diff --git a/utils/util.js b/utils/util.js
index d99accd..d28ccb5 100644
--- a/utils/util.js
+++ b/utils/util.js
@@ -404,5 +404,6 @@ module.exports = {
     check_mobile: check_mobile,//验证手机
     get_rand_item:get_rand_item, //随机获取元素   
     getDistance:getDistance,  //获取俩个经纬网度之间的距离
-    draw_randon_rect:draw_randon_rect  //画图画圆角矩形
+    draw_randon_rect:draw_randon_rect  ,//画图画圆角矩形
+	null_promise:null_promise,//返回空的promise
 };