function prix(){
		var pack = document.getElementById('pack').value;
		var capacite = document.getElementById('capacite').value;
		var resultat = document.getElementById('resultat');
		var offre = document.getElementById('offre');
		var paiement = document.getElementById('pay_by');
		var pForPack1 = 5;
		var pForPack2 = 7.5;
		var chf = " €/mois";
			
		
		if(pack == 1){
		
			document.getElementById('bv').disabled = false;
			document.getElementById('cc').disabled = false;
			for(i = 1; i != 10; i++){
				document.getElementById('capacite').options[i].disabled = false;
			}
			document.getElementById('capacite').options[0].disabled = true;
			document.getElementById('capacite').options[1].disabled = false;
			document.getElementById('capacite').options[2].disabled = false;
			if(capacite < 20){	
				document.getElementById('capacite').options[1].selected = true;
				capacite = 20;
				resultat.value = 12 + chf;
				offre.value = '103';
			}
			switch (capacite){
				case "20" :
				resultat.value = "12 € /mois";
				offre.value = '103';
				break;
				case "30":
				resultat.value = 12 + (pForPack1) + chf;
				offre.value = '104';
				break;
				case "40" :
				resultat.value = 12 + (2*pForPack1) + chf;
				offre.value = '105';
				break;
				case "50" :
				resultat.value = 12 + (3*pForPack1) + chf;
				offre.value = '106';
				break;
				case "60" :
				resultat.value = 12 + (4*pForPack1) + chf;
				offre.value = '107';
				break;
				case "70" :
				resultat.value = 12 + (5*pForPack1) + chf;
				offre.value = '108';
				break;
				case "80" :
				resultat.value = 12 + (6*pForPack1) + chf;
				offre.value = '109';
				break;
				case "90" :
				resultat.value = 12 + (7*pForPack1) + chf;
				offre.value = '110';
				break;
				case "100" :
				resultat.value = 12 + (8*pForPack1) + chf;
				offre.value = '111';
				break;
			}
			
		}
		else if(pack == 2){
			document.getElementById('bv').disabled = false;
			document.getElementById('cc').disabled = false;
			if(capacite < 40){
				document.getElementById('capacite').options[3].selected = true;
				capacite = 40;
				resultat.value = 45 + chf;
				offre.value = '113';
			}
			for(i = 1; i != 10; i++){
				document.getElementById('capacite').options[i].disabled = false;
			}
			document.getElementById('capacite').options[0].disabled = true;
			document.getElementById('capacite').options[1].disabled = true;
			document.getElementById('capacite').options[2].disabled = true;
			
			switch (capacite){
				case "40" :
				resultat.value = 45 + chf;
				offre.value = '113';
				break;
				case "50" :
				resultat.value = 45 + (pForPack2) + chf;
				offre.value = '114';
				break;
				case "60" :
				resultat.value = 45 + (2*pForPack2) + chf;
				offre.value = '115';
				break;
				case "70" :
				resultat.value = 45 + (3*pForPack2) + chf;
				offre.value = '116';
				break;
				case "80" :
				resultat.value = 45 + (4*pForPack2) + chf;
				offre.value = '117';
				break;
				case "90" :
				resultat.value = 45 + (5*pForPack2) + chf;
				offre.value = '118';
				break;
				case "100" :
				resultat.value = 45 + (6*pForPack2) + chf;
				offre.value = '119';
				break;
			}
		}
		else if(pack == 3){
			document.getElementById('capacite').options[0].disabled = false;
			for(i = 1; i != 10; i++){
				document.getElementById('capacite').options[i].disabled = true;
			}
			document.getElementById('capacite').options[0].selected = true;
			capacite = 5;
			document.getElementById('bv').disabled = true;
			document.getElementById('cc').disabled = true;
			offre.value = '112';
			resultat.value = "Gratuit 28 jours";
		}
	}
	
	function disableRadio(){
		document.getElementById('bv').disabled = true;
		document.getElementById('cc').disabled = true;
	}
	function enableRadio(){
		document.getElementById('bv').disabled = false;
		document.getElementById('cc').disabled = false;
	}