function login() {
	var loginForm = document.getElementById("loginfrm");
	if (loginForm.password.value == "") {
		alert("Please enter your password.");
		return false;
	}
	var submitForm = document.getElementById("submitfrm");
	var pwdhash = hex_md5(loginForm.password.value);
	submitForm.response.value =
		hex_md5(loginForm.challenge.value+pwdhash);
	submitForm.submit();
}