<!--
	// field check
	function checkform() {
		if (trim(document.login.login.value) == '' ||
				document.login.password.value == '') {
			alert('Empty login or password');
			return false;
		}

		return true;
	} 

  function doChallengeResponse() {
    str = document.login.login.value + ":" +
          document.login.password.value + ":" +
          document.login.challenge.value;

    document.login.response.value = MD5(str);
    document.login.password.value = "";
    document.login.submit();
  }
// -->