function validar(form) {
	if ((form.Nombre.value == null) || (form.Nombre.value=="")) {
	 alert("Please, fill your Name");
	 form.Nombre.focus();
	 return false;
	}
				
	if ((form.mail.value == null) || (form.mail.value=="")) {
	 alert("Please, fill your EMail");
	 form.mail.focus();
	 return false;
	}
	
	if ((form.mensaje.value == null) || (form.mensaje.value=="")) {
	 alert("Please, Fill your Message");
	 form.mensaje.focus();
	 return false;
	}
	if ((form.captcha.value == null) || (form.captcha.value=="")) {
	 alert("Please, Fill your Result");
	 form.captcha.focus();
	 return false;
	}
	if ((form.cap.value != form.captcha.value)) {
	 alert("Please, Fill a correct Result");
	  form.captcha.focus();
	 return false;
	}
	
	if (form.mail.value.indexOf("@") != -1)
	 return true;
	 else {
	 alert('Please, you should to fill a valide email');
	  form.mail.focus();
	 return false;
	}
		
	return true;

}