function check_pais(pais, preu1, preu2, preu3, aduana){
	if(pais != "spain") {
		document.getElementById('NIF').style.visibility = "hidden";
		document.getElementById('preu1').innerHTML = preu1+" Euros";
		document.getElementById('preu2').innerHTML = preu2+" Euros";
		document.getElementById('preu3').innerHTML = preu3+" Euros";
	} else {
		preu1 = parseFloat(preu1);
		preu1 = preu1+((preu1*16)/100)+aduana;
		preu2 = parseFloat(preu2);
		preu2 = preu2+((preu2*16)/100)+aduana;
		preu3 = parseFloat(preu3);
		preu3 = preu3+((preu3*16)/100)+aduana;
		document.getElementById('NIF').style.visibility = "visible";
		document.getElementById('preu1').innerHTML = preu1+" Euros - iva y gastos de aduana incluidos -";
		document.getElementById('preu2').innerHTML = preu2+" Euros - iva y gastos de aduana incluidos -";
		document.getElementById('preu3').innerHTML = preu3+" Euros - iva y gastos de aduana incluidos -";
	}
}