Change hidden div to input name

common/lib/xmodule/xmodule/css/combinedopenended/display.scss

@@ -40,7 +40,6 @@ section.combined-open-ended {
       width: 93%;
       position:relative;
   }
-
 }
 
 section.combined-open-ended-status {

common/lib/xmodule/xmodule/js/src/combinedopenended/display.coffee

@@ -76,8 +76,8 @@ class @CombinedOpenEnded
 
     fd = new FormData()
     feedback = evaluation_scoring.find('textarea.feedback-on-feedback')[0].value
-    submission_id = external_grader_message.find('div.submission_id')[0].innerHTML
-    grader_id = external_grader_message.find('div.grader_id')[0].innerHTML
+    submission_id = external_grader_message.find('input.submission_id')[0].innerHTML
+    grader_id = external_grader_message.find('input.grader_id')[0].innerHTML
     score = evaluation_scoring.find("input:radio[name='evaluation-score']:checked").val()
 
     fd.append('feedback', feedback)

common/lib/xmodule/xmodule/open_ended_module.py

@@ -332,9 +332,9 @@ class OpenEndedModule(openendedchild.OpenEndedChild):
         def format_feedback_hidden(feedback_type , value):
             feedback_type,value=encode_values(feedback_type,value)
             feedback = """
-            <div class="{feedback_type}" style="display: none;">
+            <input class="{feedback_type}" style="display: none;" type="hidden">
             {value}
-            </div>
+            </input>
             """.format(feedback_type=feedback_type, value=value)
             return feedback