diff --git a/app/views/users/choose_user_course.js.erb b/app/views/users/choose_user_course.js.erb
index 512a66018..19a244396 100644
--- a/app/views/users/choose_user_course.js.erb
+++ b/app/views/users/choose_user_course.js.erb
@@ -8,7 +8,7 @@
 <%# else %>
     <% if params[:is_observe].nil? %>
         var htmlvalue = "<%= escape_javascript(render :partial => 'users/send_homework_to_course', :locals => {:courses => @course, :user => @user, :send_id => @send_id}) %>";
-        pop_box_new(htmlvalue,460,50,50);
+        pop_box_new(htmlvalue,460,435);
     <% else %>
         $("#send_homework_to_course_form").html("<%= escape_javascript(render :partial => 'users/send_homework_to_course_form', :locals => {:courses => @course, :user => @user, :send_id => @send_id}) %>");
     <% end %>
diff --git a/app/views/users/send_homework_to_course.js.erb b/app/views/users/send_homework_to_course.js.erb
index 7db28b869..2541c5bc7 100644
--- a/app/views/users/send_homework_to_course.js.erb
+++ b/app/views/users/send_homework_to_course.js.erb
@@ -1,4 +1,4 @@
 $("#subject_count_homework_<%=@homework.id %>").html(<%= @homework.quotes %>);
 hideModal();
 var htmlvalue = "<%= escape_javascript(render :partial => 'homework_post_notice') %>";
-pop_box_new(htmlvalue,380,40,50);
\ No newline at end of file
+pop_box_new(htmlvalue,380,182);
\ No newline at end of file
diff --git a/app/views/users/show_homework_detail.js.erb b/app/views/users/show_homework_detail.js.erb
index 8c0e3c54a..cbb0cf057 100644
--- a/app/views/users/show_homework_detail.js.erb
+++ b/app/views/users/show_homework_detail.js.erb
@@ -3,5 +3,5 @@
     $("#choose_courses_notice").html("");
 <% else %>
     var htmlvalue = "<%= escape_javascript(render :partial => 'users/homework_repository_detail') %>";
-    pop_box_new(htmlvalue,820,50,50);
+    pop_box_new(htmlvalue,820,155);
 <% end %>
\ No newline at end of file
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 20040f559..cfeb4b341 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -1495,7 +1495,7 @@ function pop_up_box(value,tWidth,tTop,tLeft){
 // 公共弹框样式
 function pop_box_new(value, Width, Height){
     w = ($(window).width() - Width)/2;
-    h = ($(window).height() - Height)/2;
+    h = ($(window).height() - Height)/2 - 100;
     $("#ajax-modal").html(value);
     showModal('ajax-modal', Width + 'px');
     $('#ajax-modal').siblings().remove();
@@ -1552,9 +1552,7 @@ function pop_box_new(value, Width, Height){
         document.onmousemove = null;
     }
 
-    window.onload = function () {
-        new Drag("popupWrap");
-    }
+    new Drag("popupWrap");
 }
 
 // 公共提示弹框样式