function CheckForm() {
var username = GetId('username').value;
var password = GetId('password').value;
if(password == '' || username == ''){
		alert('Please insert an username AND password');
}
else
GetId('login_form').submit();
}

function CheckFormLostPassword() {
var email = GetId('email').value;

if(email == ''){
		alert('Please insert an email');
}
else
GetId('lost-password_form').submit();
}