function validar(formulario) 
{
	if (formulario.surname.value.length<1)
  {
		alert ("Please, Fill in your \"Surname\".");
		formulario.surname.focus();
		return (false);
	}

	if (formulario.firstname.value.length<1)
	{
		alert ("Please, Fill in your \"First Name\".");
		formulario.firstname.focus();
		return (false);
	}
	
	email=formulario.email.value;
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email)==false)
	{
	   	alert ("Please, Fill in your \"Email\".");
	    formulario.email.focus();
	    return (false);
	 } 	

	if (formulario.country.value.length<3)
	{
		alert ("Please, Fill in your \"Country\".");
		formulario.country.focus();
		return (false);
	}
	
	if (formulario.firstname.value == formulario.surname.value)
	{
	 alert ("First Name should be different than Last Name");
	 formulario.firstname.focus();
	 return (false);
	}
}