diff --git a/admin/views/upload.php b/admin/views/upload.php
index 42b2f0d9..94c4012a 100755
--- a/admin/views/upload.php
+++ b/admin/views/upload.php
@@ -66,7 +66,7 @@
                     rheight:file.picHeight//相对高度
                 };
                 //单张图替换对象
-                if(source instanceof Array){//源数据为数组
+                if(Object.prototype.toString.call(source) == "[object Array]"){//源数据为数组
                     source.splice(0, 1, img);
                 } else {//源数据为对象,编辑属性才能触发渲染
                     source.src = img.src;
@@ -186,7 +186,7 @@
         imgs.map(function(v,i){
             if(1 == mode){
                 //单张图替换对象
-                if(source instanceof Array){//源数据为数组
+                if(Object.prototype.toString.call(source) == "[object Array]"){//源数据为数组
                     console.log(source);
                     source.splice(0, 1, v);
                 } else {//源数据为对象
diff --git a/admin/views/uploadpdf.php b/admin/views/uploadpdf.php
index c96869ba..563e4d7c 100644
--- a/admin/views/uploadpdf.php
+++ b/admin/views/uploadpdf.php
@@ -72,7 +72,7 @@
         files.map(function(v,i){
             if(1 == mode){//只有一个替换
                 //单个替换对象
-                if(source instanceof Array){//源数据为数组
+                if(Object.prototype.toString.call(source) == "[object Array]"){//源数据为数组
                     source.splice(0, 1, v);
                 } else {//源数据为对象
                     source = v;