<script type="text/javascript">
            $(document).ready(function(){
                var grsVal = $('#grs').val();
                var greVal = $('#gre').val();
                $('#grs').change(function(){
                    if ($(this).val() == $('#gre').val()) {
                        $('#tiredThreshold').show(); //show
                    } else {
                        $('#tiredThreshold').hide(); //hide
                    }
                });
                $('#gre').change(function(){
                    if ($(this).val() == $('#grs').val()) {
                          $('#tiredThreshold').show(); //show
                      } else {
                          $('#tiredThreshold').hide(); //hide
                      }
                });
            });
         </script>