diff --git a/public/assets/wechat/blog_detail.html b/public/assets/wechat/blog_detail.html
index daeec493d..2d11b5964 100644
--- a/public/assets/wechat/blog_detail.html
+++ b/public/assets/wechat/blog_detail.html
@@ -25,7 +25,7 @@
                     <div ng-if="blog.praise_count && !blog.has_praise" ng-click="addPraise(blog);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{blog.praise_count}}</span></div>
                     <div ng-if="blog.has_praise" ng-click="decreasePraise(blog);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{blog.praise_count}}</span></div>
                 </div>
-                <div class="fr mr25 f13" input-focus>
+                <div id="replyBlock" class="fr mr25 f13" input-focus>
                     <a ng-if="!blog.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                     <a ng-if="blog.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{blog.comment_count}}</span></a>
                 </div>
diff --git a/public/assets/wechat/course_discussion.html b/public/assets/wechat/course_discussion.html
index 78a3fa0b7..2395129c3 100644
--- a/public/assets/wechat/course_discussion.html
+++ b/public/assets/wechat/course_discussion.html
@@ -24,7 +24,7 @@
                             <div ng-if="discussion.praise_count && !discussion.has_praise" ng-click="addPraise(discussion);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{discussion.praise_count}}</span></div>
                             <div ng-if="discussion.has_praise" ng-click="decreasePraise(discussion);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{discussion.praise_count}}</span></div>
                         </div>
-                        <div class="fr mr25 f13" input-focus>
+                        <div id="replyBlock" class="fr mr25 f13" input-focus>
                             <a ng-if="!discussion.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                             <a ng-if="discussion.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{discussion.comment_count}}</span></a>
                         </div>
diff --git a/public/assets/wechat/course_notice.html b/public/assets/wechat/course_notice.html
index af9f22da1..85b3a901a 100644
--- a/public/assets/wechat/course_notice.html
+++ b/public/assets/wechat/course_notice.html
@@ -23,7 +23,7 @@
                         <div ng-if="news.praise_count && !news.has_praise" ng-click="addPraise(news);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{news.praise_count}}</span></div>
                         <div ng-if="news.has_praise" ng-click="decreasePraise(news);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{news.praise_count}}</span></div>
                     </div>
-                    <div class="fr mr25 f13" input-focus>
+                    <div id="replyBlock" class="fr mr25 f13" input-focus>
                         <a ng-if="!news.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                         <a ng-if="news.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{news.comment_count}}</span></a>
                     </div>
diff --git a/public/assets/wechat/homework_detail.html b/public/assets/wechat/homework_detail.html
index 6ead09e69..7fa8459c4 100644
--- a/public/assets/wechat/homework_detail.html
+++ b/public/assets/wechat/homework_detail.html
@@ -28,7 +28,7 @@
                     <div ng-if="homework.praise_count && !homework.has_praise" ng-click="addPraise(homework);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{homework.praise_count}}</span></div>
                     <div ng-if="homework.has_praise" ng-click="decreasePraise(homework);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{homework.praise_count}}</span></div>
                 </div>
-                <div class="fr mr25 f13" input-focus>
+                <div id="replyBlock" class="fr mr25 f13" input-focus>
                     <a ng-if="!homework.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                     <a ng-if="homework.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{homework.comment_count}}</span></a>
                 </div>
diff --git a/public/assets/wechat/issue_detail.html b/public/assets/wechat/issue_detail.html
index c10d15ddb..efc7ed64d 100644
--- a/public/assets/wechat/issue_detail.html
+++ b/public/assets/wechat/issue_detail.html
@@ -29,7 +29,7 @@
                         <div ng-if="issue.praise_count && !issue.has_praise" ng-click="addPraise(discussion);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{issue.praise_count}}</span></div>
                         <div ng-if="issue.has_praise" ng-click="decreasePraise(issue);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{issue.praise_count}}</span></div>
                     </div>
-                    <div class="fr mr25 f13" input-focus>
+                    <div id="replyBlock" class="fr mr25 f13" input-focus>
                         <a ng-if="!issue.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                         <a ng-if="issue.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{issue.comment_count}}</span></a>
                     </div>
diff --git a/public/assets/wechat/jour_message_detail.html b/public/assets/wechat/jour_message_detail.html
index 41f7290e5..e2e65ca58 100644
--- a/public/assets/wechat/jour_message_detail.html
+++ b/public/assets/wechat/jour_message_detail.html
@@ -23,7 +23,7 @@
                         <div ng-if="message.praise_count && !message.has_praise" ng-click="addPraise(message);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{message.praise_count}}</span></div>
                         <div ng-if="message.has_praise" ng-click="decreasePraise(message);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{message.praise_count}}</span></div>
                     </div>
-                    <div class="fr mr25 f13" input-focus>
+                    <div id="replyBlock" class="fr mr25 f13" input-focus>
                         <a ng-if="!message.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                         <a ng-if="message.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{message.comment_count}}</span></a>
                     </div>
diff --git a/public/assets/wechat/project_discussion.html b/public/assets/wechat/project_discussion.html
index 4557ba55f..30d464802 100644
--- a/public/assets/wechat/project_discussion.html
+++ b/public/assets/wechat/project_discussion.html
@@ -24,7 +24,7 @@
                         <div ng-if="discussion.praise_count && !discussion.has_praise" ng-click="addPraise(discussion);"><img src="/images/wechat/w_praise.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{discussion.praise_count}}</span></div>
                         <div ng-if="discussion.has_praise" ng-click="decreasePraise(discussion);"><img src="/images/wechat/w_praised.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span>{{discussion.praise_count}}</span></div>
                     </div>
-                    <div class="fr mr25 f13" input-focus>
+                    <div id="replyBlock" class="fr mr25 f13" input-focus>
                         <a ng-if="!discussion.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">回复</span></a>
                         <a ng-if="discussion.comment_count"><img src="/images/wechat/w_reply.png" width="20" style="vertical-align:top; margin-top:2px;" class="mr5" /><span style="vertical-align:top;">{{discussion.comment_count}}</span></a>
                     </div>
diff --git a/public/javascripts/wechat/directives/iphone_recognize.js b/public/javascripts/wechat/directives/iphone_recognize.js
index 66014e71a..46d4a4292 100644
--- a/public/javascripts/wechat/directives/iphone_recognize.js
+++ b/public/javascripts/wechat/directives/iphone_recognize.js
@@ -7,21 +7,26 @@ app.directive('iphoneRecognize',["$timeout",function(timer){
         scope: {},
         link: function(scope, element){
            timer(function(){
-               var userAgent = navigator.userAgent;
                var contentHeight = $(".post-container").height();
-            if (/ipad|iphone|mac/i.test(navigator.userAgent)){
-               $("#postInput1").bind('focus',function(){
+               var toBottom = function(){
                    element.css({"position":"relative","padding":"1px 0"});
-                   $(".post-wrapper").css("margin-bottom","0");
-                   $("#all_homework_reply").css("margin-bottom","0");
+                   $(".post-wrapper").css("marginBottom","0");
+                   $("#all_homework_reply").css("marginBottom","0");
                    window.scrollTo(0,contentHeight);
-               });
-               $("#postInput1").bind('blur',function(){
-                   element.css("position","fixed");
-                   $(".post-wrapper").css("margin-bottom","10px");
-                   $("#all_homework_reply").css("margin-bottom","50px");
-               });
-            }
+               }
+               if (/ipad|iphone|mac/i.test(navigator.userAgent)){
+                   $("#postInput1").bind('focus',function(){
+                       toBottom();
+                   });
+                   $("#postInput1,#replyBlock").bind("click",function(){
+                       toBottom();
+                   });
+                   $("#postInput1").bind('blur',function(){
+                       element.css("position","fixed");
+                       $(".post-wrapper").css("marginBottom","10px");
+                       $("#all_homework_reply").css("marginBottom","50px");
+                   });
+               }
            })
         }
     }