<select class='form-control' id=class_code name=class_code
          onchange='setTextField(this)'><option value=''>Select
          class</option>";
         <option value=$row[class_code] >$row[class]</option>";
             }
        </select>
        <input id='cls' type = 'hidden' name = 'cls' value = '' />
           <script type='text/javascript'>
          function setTextField(dddl) {
               document.getElementById('cls').value =
            dddl.options[dddl.selectedIndex].text;
               }
            </script>







            <select class='form-control' id=semester_id name=semester_id
            onchange='setTextField(this)'><option value=''>Select
             semester</option></select>
            <input id='semm' type = 'hidden' name = 'semm' value = '' />
           <script type='text/javascript'>
          function setTextField(ddl) {
              document.getElementById('semm').value =
              ddl.options[ddl.selectedIndex].text;
                }
           </script>