function fixElement(element, message) {
	alert(message);
	element.focus();
}
function verifica(form) {
	var passed = false;
	var filter=/^[A-Za-z0-9_.-]*@[A-Za-z0-9_]+\.[A-Za-z0-9_.]+[A-za-z]$/;
//	alert (filter.test(form.email.value));
	if (form.nombre.value == "") {
		fixElement(form.nombre, "El campo nombre es obligatorio.");
	}
	else if (form.telefono.value == "") {
		fixElement(form.telefono, "Se debe informar un telefono de contacto.");
	}
	else if (form.email.value == "") {
		fixElement(form.email, "Se debe informar un correo electronico de contacto.");
	}
	else if (!filter.test(form.email.value)){
		fixElement(form.email, "Se debe informar un correo electronico valido.");
	}
	else {	
		passed = true;
	}
	return passed;
}