function loginValidator(Formu)
{
if (Formu.myusername.value == "")
{
alert("Ingresa tu nick");
Formu.myusername.focus();
return (false);
}
if (Formu.mypassword.value == "")
{
alert("Ingresa tu password");
Formu.mypassword.focus();
return (false);
}
}