fixed:聊天记录修改

@@ -408,7 +408,8 @@ function pageInit() {
      * @private
      */
     function handleCusMsg(rec, msgType, message) {
-        var dom;
+        var dom,
+            image;
 
         message.newContent = emojiPrefix(message.newContent);
 
@@ -428,7 +429,7 @@ function pageInit() {
                 newContent: message.newContent
             });
 
-            var image = new Image();
+            image = new Image();
             image.src = message.content;
             image.onload = function() {
                 msgAppend(dom);
@@ -468,7 +469,8 @@ function pageInit() {
      * @private
      */
     function handleCsMsg(rec, msgType, message) {
-        var dom;
+        var dom,
+            image;
 
         message.newContent = emojiPrefix(message.newContent);
         if (msgType === 2) {
@@ -481,7 +483,7 @@ function pageInit() {
                 newContent: message.newContent
             });
 
-            var image = new Image();
+            image = new Image();
             image.src = message.content;
             image.onload = function() {
                 msgAppend(dom);
@@ -678,7 +680,7 @@ function pageInit() {
                 $reconnect = $msgList.find('.list-item')
                         .last().find('.reconnect');
 
-                if(!$reconnect.length) {
+                if (!$reconnect.length) {
                     offlineTip();
                 }
             },
@@ -728,7 +730,7 @@ function pageInit() {
                         if (!item.userHead) {
                             item.userHead = assetsPrefix + socketConf.defaultUserHead;
                         }
-                        dom = cusTpl({
+                        dom += cusTpl({
                             userHead: item.userHead,
                             userName: item.userName,
                             sendTimeShort: item.sendTimeShort,
@@ -738,7 +740,7 @@ function pageInit() {
 
                     case allRTs.ROBOT_SEND:
                         item.csName = item.csName || '客服机器人';
-                        dom = robotTpl({
+                        dom += robotTpl({
                             assetsPrefix: assetsPrefix,
                             csName: item.csName,
                             sendTimeShort: item.sendTimeShort,
@@ -747,7 +749,7 @@ function pageInit() {
                         break;
 
                     case allRTs.CS_SEND:
-                        dom = csTpl({
+                        dom += csTpl({
                             csHead: item.csHead,
                             csName: item.csName,
                             sendTimeShort: item.sendTimeShort,