增加 back_image

@@ -626,7 +626,8 @@ $(document).on("click", "#sub_btn", function () {
 var addSuffix = function (contentData) {
     if (typeof  contentData == "object") {
         for (var i in contentData) {
-            if (i == "src" && contentData[i].indexOf("?") == -1) {
+            // back_image 背景图
+            if ((i == "src" || i == "back_image") && contentData[i].indexOf("?") == -1) {
                 contentData[i] = contentData[i] + "?imageView2/{mode}/w/{width}/h/{height}";
             } else {
                 addSuffix(contentData[i]);