fix ajax url issue

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

 $(document).on('click', 'section.sa-wrapper input#show', ( ->
   post_url=$('section.sa-wrapper input#show').attr('url')
-  final_url="/courses/MITx/6.002x/2012_Fall/modx/#{post_url}/sa_show"
+  final_url="#{post_url}/sa_show"
   answer=$('section.sa-wrapper textarea#answer').val()
   $.post final_url, answer, (response) ->
     if response.success
@@ -15,7 +15,7 @@ $(document).on('click', 'section.sa-wrapper input#show', ( ->
 $(document).on('click', 'section.sa-wrapper input#save', ( ->
   assessment_correct=$('section.sa-wrapper #assessment').find(':selected').text()
   post_url=$('section.sa-wrapper input#save').attr('url')
-  final_url="/courses/MITx/6.002x/2012_Fall/modx/#{post_url}/sa_save"
+  final_url="#{post_url}/sa_save"
   $.post final_url, assessment_correct, (response) ->
     if response.success
       $('section.sa-wrapper p#save_message').append(response.message)

common/lib/xmodule/xmodule/self_assessment_module.py

@@ -66,16 +66,14 @@ class SelfAssessmentModule(XModule):
         problem_form=('<section class="sa-wrapper"><textarea name="answer" '
                       'id="answer" cols="50" rows="5"/><br/>'
                       '<input type="button" value="Check" id ="show" name="show" url="{0}"/>'
-                      '<p id="rubric"></p></section><br/><br/>').format(self.location)
+                      '<p id="rubric"></p></section><br/><br/>').format(system.ajax_url)
 
         rubric_form=('<br/><br/>Please assess your performance given the above rubric: <br/>'
                      '<br/><section class="sa-wrapper"><select name="assessment" id="assessment">'
                      '<option value="incorrect">Incorrect</option><option value="correct">'
                      'Correct</option></select><br/>'
                      '<input type="button" value="Save" id="save" name="save" url="{0}"/>'
-                     '<p id="save_message"></p></section><br/><br/>').format(self.location)
-
-
+                     '<p id="save_message"></p></section><br/><br/>').format(system.ajax_url)
 
         self.problem=''.join([self.problem,problem_form])
         self.rubric=''.join([self.rubric,rubric_form])