diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index aeb9e645a..5165a67bc 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -1054,10 +1054,12 @@ function showNormalImage(id) {
 
             //无格式的图片不让点击显示大图，显示的话会有问题
             var tmpsrc = image.attr('src');
-            if (tmpsrc.indexOf('.gif') >= 0 || tmpsrc.indexOf('.jpg') >= 0 || tmpsrc.indexOf('.jpeg') >= 0 || tmpsrc.indexOf('.png') >= 0 || tmpsrc.indexOf('.bmp') >= 0 || tmpsrc.indexOf('.png') >= 0 || tmpsrc.indexOf('.BMP') >= 0 || tmpsrc.indexOf('.JPEG') >= 0 || tmpsrc.indexOf('.JPG') >= 0 || tmpsrc.indexOf('.PNG') >= 0 || tmpsrc.indexOf('.GIF') >= 0) {
-                var element = $("<a></a>").attr("href", image.attr('src'));
-                image.wrap(element);
-                $(image).parent().colorbox({rel: 'nofollow', close: "关闭", returnFocus: false});
+            if(tmpsrc){
+                if (tmpsrc.indexOf('.gif') >= 0 || tmpsrc.indexOf('.jpg') >= 0 || tmpsrc.indexOf('.jpeg') >= 0 || tmpsrc.indexOf('.png') >= 0 || tmpsrc.indexOf('.bmp') >= 0 || tmpsrc.indexOf('.png') >= 0 || tmpsrc.indexOf('.BMP') >= 0 || tmpsrc.indexOf('.JPEG') >= 0 || tmpsrc.indexOf('.JPG') >= 0 || tmpsrc.indexOf('.PNG') >= 0 || tmpsrc.indexOf('.GIF') >= 0) {
+                    var element = $("<a></a>").attr("href", image.attr('src'));
+                    image.wrap(element);
+                    $(image).parent().colorbox({rel: 'nofollow', close: "关闭", returnFocus: false});
+                }
             }
         }
         //$('#'+id+' a').colorbox({rel:'nofollow', close: "关闭", returnFocus: false}); //有图片才将链接变为弹出框