回退bug

b/content.html

@@ -26,6 +26,13 @@
         <a href="http://www.baidu.com" class="operateBtn" title="返回首页">返回首页</a>
     </div>
 </div>
+<script language="javascript">
+    //防止页面后退
+    history.pushState(null, null, document.URL);
+    window.addEventListener('popstate', function () {
+    history.pushState(null, null, document.URL);
+    });
+    </script>
 <script>
     var userIp = window.location.search.split('?ip=')[1]
     if(userIp){

js/buriedPoint.js

@@ -20,6 +20,7 @@ function viewPage(callback) {
 
     $.ajax({
         url: _url + '/info/updatePvUv',
+        async: false,
         data: {
             cid: icid,
             targetCid: icid,