function validate(f) {
    var email_pattern = /.@.*\./;
    var notnull_pattern = /\S/;

    if (!notnull_pattern.test(f.name.value)) {
      alert("A NAME is required to complete your request.");
      return false;
    }
    if (!email_pattern.test(f.email.value)) {
      alert("A valid EMAIL ADDRESS is required to complete your request.");
      return false;
    }
    if (!notnull_pattern.test(f.topic.value)) {
      alert("A TOPIC is required to complete your request.");
      return false;
    }
    if (f.email.value != f.emailv.value) {
      alert("Your email fields do not match.\n Please correct them.");
      return false;
    }
  }
  //--></script>