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

function submitenter(myfield,e)
{
var keycode;
if (window.event) keycode = window.event.keyCode;
else if (e) keycode = e.which;
else return true;

if (keycode == 13)
   {
   myfield.form.submit();
   return false;
   }
else
   return true;
}