<script type="text/JavaScript">

             <!--



          var procedenciaValida = NEW ARRAY(

          "http://172.16.9.26/pls/becas2",

          "http://becassvr3s/pls/becas2/");

          var ok = FALSE;

          FOR(i IN procedenciaValida) {

                    IF(document.referrer.indexOf(procedenciaValida[i]) > -1) {

                   ok = TRUE;

                }

          }
 ok = true /*borrar*/



           IF(!ok) {

          document.LOCATION.href="http://www.conacyt.gob.mx";

          }

          // -->

          </script>