修改作品会跳转到一个空白的错误页面

app/views/student_work/edit.html.erb

@@ -46,7 +46,7 @@
         </p>
         <div class="cl"></div>
         <p class="ml80 ">
-          <a href="javascript:void(0)" target="_blank" class="blue_btn fl c_white" onclick="edit_student_work(<%= @work.id%>);">提交作品</a>
+          <a href="javascript:void(0)" class="blue_btn fl c_white" onclick="edit_student_work(<%= @work.id%>);">提交作品</a>
           <%= link_to "返&nbsp;&nbsp;回".html_safe, student_work_index_path(:homework => @homework), :class => "blue_btn grey_btn fl c_white"%>
         <div class="cl"></div>
         </p>