function checkLogin(form) {
	var result = false;

	if ((form.password.value == '') && (form.login.value == '')) {
		alert('Favor preencher os campos LOGIN e SENHA.');
		form.login.focus();
	}
	else if (form.login.value == '') {
		alert('Favor preencher o campo LOGIN.');
		form.login.focus();
	}
	else if (form.password.value == '') {
		alert('Favor preencher o campo SENHA.');
		form.password.focus();
	}
	else {
		form.password.value = md5(form.password.value);
		result = true;
	}

	return result;
}