function valida_login_bloq() {
	
	oName = document.getElementById('UserNombreUsuario');
	if (oName.value == "") {
		document.getElementById('div_user_error').style.display = "block";
		return false;
	}
	else{
		document.getElementById('div_user_error').style.display = "none";
	}
	
	oPass = document.getElementById('UserPassword');
	if (oPass.value == "") {
		document.getElementById('div_password_error').style.display = "block";
		return false;
	}
	else{
		document.getElementById('div_password_error').style.display = "none";
	}
}