diff --git a/app/views/courses/_groups_name.html.erb b/app/views/courses/_groups_name.html.erb
index 2a53e2780..9a57d1127 100644
--- a/app/views/courses/_groups_name.html.erb
+++ b/app/views/courses/_groups_name.html.erb
@@ -12,15 +12,15 @@
         }
     }
     function validate_update(name) {
-         value1 = document.getElementsByName(name)[0].value;
+         value1 = document.getElementById(name).value;
         validate_groupname(value1);
-        document.getElementsByName(name)[0].value = "";
+
     }
         function validate_add_group() {
-             value1 = document.getElementsByName("group_name")[0].value;
+             value1 = document.getElementById('group_name').value;
             validate_groupname(value1);
             validate_groupname_null(value1);
-            document.getElementsByName('group_name')[0].value = "";
+
         }
 </script>
 
@@ -54,7 +54,7 @@
       <li>
         <%= form_tag(updategroupname_course_path(@course,:group_id => group.id), method: 'get', remote:true, update: 'group_name') do %>
                 <span id="add_tag_<%= group.id %>" style="display:none; vertical-align: middle;" class=" f_l">
-                    <%= text_field_tag "group_name", params[:group_name],:name => "group_name#{group.id}", :size=>10, :class=>"isTxt w90 f_l", :style=>"padding: 0px", :max => 20 %>
+                    <%= text_field_tag "group_name#{group.id}", params[:group_name],:name => "group_name", :size=>10, :class=>"isTxt w90 f_l", :style=>"padding: 0px", :max => 20 %>
                     <!--<input type="button" class="submit f_l" onclick="addTag();" style="width: 43px"/>-->
                   <%= submit_tag '', class: "submit f_l", :onclick => "validate_update('group_name#{group.id}')", style: "width: 43px;height: 21px;background: url(/images/btn.png) no-repeat 0 0;" %>
                    </span>