function onChange(prix){
			var monSelect = document.getElementById("quantity_wanted");
			var maValeur = monSelect.options[monSelect.selectedIndex].value;
			
			//
			var maDivReponse = document.getElementById("mon_prix");
			var resultat = Math.round((maValeur * prix) * 100) / 100;
			maDivReponse.innerHTML = resultat + ' €' ;
		}

function onClickRadio() {
	var monRadio = document.getElementsByName("beneficiaire");
	var maValeurRadio ="oui";
	
	for (var i =0; i< monRadio.length; i++) {
		if (monRadio[i].checked) {
			maValeurRadio = monRadio[i].value;
		}
	}
	
	if (maValeurRadio =="non") {
		var maDivBenef = document.getElementById("beneficiaire_form");
		maDivBenef.style.display = "block";
	}
	
	if (maValeurRadio =="oui") {
		var maDivBenef = document.getElementById("beneficiaire_form");
		maDivBenef.style.display = "none";
	}
	
}