diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index 3ca836773..2693eea82 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -245,15 +245,19 @@ class StudentWorkController < ApplicationController
   def student_work_absence_penalty
     render_403 unless User.current.allowed_to?(:as_teacher,@course)
     order = params[:order] || "desc"
-    work_ids = "(" + @homework.student_works.map(&:id).join(",") + ")"
-    @stundet_works = StudentWork.find_by_sql("SELECT *,(all_count - has_count) AS absence FROM(
+    if @homework.student_works.empty?
+      @stundet_works = []
+    else
+      work_ids = "(" + @homework.student_works.map(&:id).join(",") + ")"
+      @stundet_works = StudentWork.find_by_sql("SELECT *,(all_count - has_count) AS absence FROM(
       SELECT * ,
         (SELECT COUNT(*) FROM `student_works_evaluation_distributions` WHERE user_id = student_works.user_id AND student_work_id IN #{work_ids}) AS all_count,
         (SELECT COUNT(*) FROM `student_works_scores` WHERE user_id = student_works.user_id AND student_work_id IN #{work_ids}) AS has_count
       FROM `student_works`
       WHERE homework_common_id = #{@homework.id}
-    ) AS table_1
-    ORDER BY absence #{order}")
+      ) AS table_1
+      ORDER BY absence #{order}")
+    end
     @order = order == "desc" ? "asc" : "desc"
     respond_to do |format|
       format.html
diff --git a/app/views/student_work/index.html.erb b/app/views/student_work/index.html.erb
index 6325abc09..38fcb78c9 100644
--- a/app/views/student_work/index.html.erb
+++ b/app/views/student_work/index.html.erb
@@ -36,7 +36,7 @@
       <% if @show_all%>
         <input  type="text" value="<%= @name%>" placeholder="昵称、学号、姓名搜索" class="min_search ml10 fl" onkeypress="SearchByName($(this),'<%= student_work_index_path(:homework => @homework.id)%>',event);">
         <a class="student_work_search fl" onclick="SearchByName_1($(this).prev(),'<%= student_work_index_path(:homework => @homework.id)%>');" href="javascript:void(0)">搜索</a>
-        <%= link_to "缺评情况",student_work_absence_penalty_student_work_index_path(:homework => @homework.id), :class => "student_work_search fl", :target => "_blank" if @is_teacher%>
+        <%= link_to "缺评情况",student_work_absence_penalty_student_work_index_path(:homework => @homework.id), :class => "student_work_search fl", :target => "_blank" if @is_teacher && @homework.homework_type == 1 && @homework.homework_detail_manual.comment_status != 1 %>
       <% end%>
       <% if @is_teacher%>
           <div class="fr">
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index c514e8940..ce5a960cf 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -863,6 +863,10 @@ function redo() {
     window.location.reload()
 }
 
+function encodeHomeworkUrl(url){
+  var file = encodeURI(url).replace(/\+/g, '%2B');
+  return '/zipdown/download?file='+file;
+}
 
 //// 作业附件删除
 $(function(){
@@ -880,7 +884,7 @@ $(function(){
             }
 
             if(res.length==1){
-                location.href = '/zipdown/download?file='+res[0].file;return;
+                location.href = encodeHomeworkUrl(res[0].file);return;
             }
 
             document.getElementById('light').style.display='block';
@@ -893,7 +897,7 @@ $(function(){
                 } else {
                     des = '第'+res[i].index+'个学生的作品下载';
                 }
-                $('<li><span class="upload_box_span" >'+(i+1)+'.</span> <a href="/zipdown/download?file='+res[i].file+'">'+des+'</a><span class="c_grey">&nbsp;&nbsp;（共'+res[i].size+'M）</span> </li>').appendTo($container);
+                $('<li><span class="upload_box_span" >'+(i+1)+'.</span> <a href="'+ encodeHomeworkUrl(res[i].file) +'">'+des+'</a><span class="c_grey">&nbsp;&nbsp;（共'+res[i].size+'M）</span> </li>').appendTo($container);
 
             }
         }
@@ -910,7 +914,7 @@ $(function(){
             else
             {
                 if(res.length==1){
-                    location.href = '/zipdown/download?file='+res[0].file;return;
+                    location.href = encodeHomeworkUrl(res[0].file);return;
                 }
                 document.getElementById('light').style.display='block';
                 $container = $('#light .upload_box_ul');
@@ -922,7 +926,7 @@ $(function(){
                     } else {
                         des = '第'+res[i].index+'个学生的作品下载';
                     }
-                    $('<li><span class="upload_box_span" >'+(i+1)+'.</span> <a href="/zipdown/download?file='+res[i].file+'">'+des+'</a><span class="c_grey">&nbsp;&nbsp;（共'+res[i].size+'M）</span> </li>').appendTo($container);
+                    $('<li><span class="upload_box_span" >'+(i+1)+'.</span> <a href="'+ encodeHomeworkUrl(res[i].file) +'">'+des+'</a><span class="c_grey">&nbsp;&nbsp;（共'+res[i].size+'M）</span> </li>').appendTo($container);
 
                 }
             }