diff --git a/app/views/files/_hidden_file.html.erb b/app/views/files/_hidden_file.html.erb
index c8de6586f..6d8d861d5 100644
--- a/app/views/files/_hidden_file.html.erb
+++ b/app/views/files/_hidden_file.html.erb
@@ -1,23 +1,24 @@
 <script src="/javascripts/jquery.datetimepicker.js" type="text/javascript"></script>
-<div id="muban_popup_box" style="width:300px;">
+<div id="muban_popup_box" style="width:340px;">
   <div class="muban_popup_top">
     <h3 class="fl">发布设置</h3>
     <a href="javascript:void(0);" class="muban_icons_close fr" onclick="$('#datetimepicker_mask').datetimepicker('destroy');"></a>
     <div class="cl"></div>
   </div>
 
-  <div class="muban_popup_con clear mt15" style="margin-left: 47px;">
+  <div class="muban_popup_con clear mt15" style="margin-left: 37px;">
     <%= form_tag(republish_file_course_file_path(@course,@file), :multipart => true,:remote => !ie8?,:name=>"upload_form") do %>
         <div class="mb10">
           <label class="fl c_dark f14" style="margin-top: 4px;">延期发布：</label>
           <div class="calendar_div fl">
-            <input type="text" name="publish_time" id="datetimepicker_mask" placeholder="发布时间" style="width: 130px;" class="InputBox fl calendar_input" value="<%=format_time(@file.publish_time) %>">
+            <input type="text" name="publish_time" id="datetimepicker_mask" readonly="readonly" placeholder="发布时间" style="width: 130px;" class="InputBox fl calendar_input" value="<%=format_time(@file.publish_time) %>">
             <%#= calendar_for('attachment_publish_time')%>
           </div>
+          <a href="javascript:void(0)" id="reset_time" class="fl sy_btn_grey ml10" style="display: none;" onclick="reset_publish_time();">清空</a>
           <span class="fl c_red" style="margin-top: 4px;" id="publish_time_notice"></span>
           <div class="cl"></div>
         </div>
-        <a href="javascript:void(0);" class="fr sy_btn_blue" style="margin-right: 95px;" id="submit_file" onclick="submit_republish_file();">确定</a>
+        <a href="javascript:void(0);" class="fr sy_btn_blue" style="margin-right: 115px;" id="submit_file" onclick="submit_republish_file();">确定</a>
         <a href="javascript:void(0);" class="fr sy_btn_grey mr5" onclick="$('#datetimepicker_mask').datetimepicker('destroy');hideModal();">取消</a>
     <% end %>
   </div>
@@ -51,6 +52,11 @@
             $('#submit_file').parent().submit();
         }
     }
+
+    function reset_publish_time(){
+        $("#datetimepicker_mask").val('');
+        $("#reset_time").hide();
+    }
     $(function(){
         $('#datetimepicker_mask').datetimepicker({
             allowBlank:true,
@@ -58,7 +64,13 @@
             format:'Y-m-d H:i',
             formatTime:'H:i',
             formatDate:'Y-m-d',
-            validateOnBlur:false
+            validateOnBlur:false,
+            onSelectDate:function() {
+                $("#reset_time").show();
+            },
+            onSelectTime:function() {
+                $("#reset_time").show();
+            }
         });
     });
 </script>
\ No newline at end of file
diff --git a/app/views/files/_upload_course_files.erb b/app/views/files/_upload_course_files.erb
index 80cdd0cda..b396fbbab 100644
--- a/app/views/files/_upload_course_files.erb
+++ b/app/views/files/_upload_course_files.erb
@@ -52,6 +52,7 @@
                 <div class="calendar_div fl ml10">
                   <input type="text" name="publish_time" id="datetimepicker_mask" placeholder="发布时间(可选)"  style="width: 130px;" class="InputBox fl calendar_input" readonly="readonly">
                 </div>
+                <a href="javascript:void(0)" id="reset_time" class="fl sy_btn_grey ml10" style="display: none;" onclick="reset_publish_time();">清空</a>
                 <div class="cl"></div>
                 <span class="c_red f12" style="margin-top: 4px;" id="publish_time_notice"></span>
                 <div class="cl"></div>
@@ -109,6 +110,10 @@
             $('#submit_resource').parent().submit();
         <% end %>
     }
+    function reset_publish_time(){
+        $("#datetimepicker_mask").val('');
+        $("#reset_time").hide();
+    }
     $(function(){
         $('#datetimepicker_mask').datetimepicker({
             allowBlank:true,
@@ -116,7 +121,13 @@
             format:'Y-m-d H:i',
             formatTime:'H:i',
             formatDate:'Y-m-d',
-            validateOnBlur:false
+            validateOnBlur:false,
+            onSelectDate:function() {
+                $("#reset_time").show();
+            },
+            onSelectTime:function() {
+                $("#reset_time").show();
+            }
         });
     });
 </script>
\ No newline at end of file
diff --git a/app/views/files/file_hidden.js.erb b/app/views/files/file_hidden.js.erb
index 38c61660f..f8d66c854 100644
--- a/app/views/files/file_hidden.js.erb
+++ b/app/views/files/file_hidden.js.erb
@@ -1,2 +1,2 @@
 var htmlvalue = '<%= escape_javascript(render :partial => 'files/hidden_file',:locals => {:course => @course,:course_attachment_type => 1}) %>';
-pop_box_new(htmlvalue, 300, 140);
\ No newline at end of file
+pop_box_new(htmlvalue, 340, 140);
\ No newline at end of file
diff --git a/app/views/users/_user_homework_form.html.erb b/app/views/users/_user_homework_form.html.erb
index fb0f08a90..1ac38638d 100644
--- a/app/views/users/_user_homework_form.html.erb
+++ b/app/views/users/_user_homework_form.html.erb
@@ -68,7 +68,15 @@
               format:'Y-m-d H:i',
               formatTime:'H:i',
               formatDate:'Y-m-d',
-              validateOnBlur:false
+              validateOnBlur:false,
+              onSelectDate:function() {
+                  $("#reset_time").show();
+                  $("#homework_publish_time_div").show();
+              },
+              onSelectTime:function() {
+                  $("#reset_time").show();
+                  $("#homework_publish_time_div").show();
+              }
           });
           <% end %>
           <% allow_edit = homework.student_works.has_committed.count == 0 && homework.student_work_projects.count ==0 %>
@@ -94,6 +102,7 @@
       function reset_end_time(){
           $("#homework_end_time").val('');
           $("#homework_publish_time").val('');
+          $("#reset_time").hide();
           $("#homework_publish_time_div").hide();
       }
 
@@ -280,7 +289,7 @@
         <%# end %>
       </div>
       <% if !edit_mode || (edit_mode && homework.homework_detail_manual.comment_status.to_i < 1) %>
-      <a href="javascript:void(0)" id="reset_time" class="fl sy_btn_grey ml10" onclick="reset_end_time();">清空</a>
+      <a href="javascript:void(0)" id="reset_time" class="fl sy_btn_grey ml10" style="display: none;" onclick="reset_end_time();">清空</a>
       <% end %>
       <div class="fl <%= homework.publish_time.nil? ? 'none' : '' %> ml50" id="homework_publish_time_div">
         <label class="fl c_grey f14 mt5" style="margin-top: 4px;">发布时间（可选）：</label>