function validaDatos(form, locale) {
	if(form.Nombre.value==""){
		var txt = (locale == 'es') ? "Escribe tu nombre" : "Write your name";
		alert(txt);
		form.Nombre.focus();
		return false;
	}
	if(form.Apellido.value==""){
		var txt = (locale == 'es') ? "Escribe tu apellido" : "Write your last name";
		alert(txt);
		form.Apellido.focus();
		return false;
	}
	var filtro = /^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@+([_a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]{2,200}\.[a-zA-Z]{2,6}$/;
	if (!filtro.test(form.Email.value)) {
	var txt = (locale == 'es') ? "Escribe tu e-mail" : "Write your e-mail";
		alert(txt);
		form.Email.focus();
		return false;
	}
	if(form.Mensaje.value==""){
		var txt = (locale == 'es') ? "Escribe tu mensaje" : "Write your message";
		alert(txt);
		form.Mensaje.focus();
		return false;
	}
	return true;
}