function calculer() {
	var form = document.getElementById('formulaireAutresPrestationsForm');
	var mtdem = form.montant.value
	var coeff = 9999
	var calc = 9999
	var typemat = ''
	var lieu = ''
	var duree = ''
	var usage = ''
//init parametres
	var zradio = form.typeMateriel
	for (i=0;i < zradio.length;i++) {
		if (zradio[i].checked == true) {
			typemat = zradio[i].value
		}
	}
	var zradio = form.territorialite
	for (i=0;i < zradio.length;i++) {
		if (zradio[i].checked == true) {
			lieu = zradio[i].value
		}
	}
	if (typemat != 'ordinateur') {
		var zradio = form.duree
		for (i=0;i < zradio.length;i++) {
			if (zradio[i].checked == true) {
				duree = zradio[i].value
			}
		}
	}
	if ((typemat == 'photo') || (typemat == 'video')) {
		var zradio = form.usage
		for (i=0;i < zradio.length;i++) {
			if (zradio[i].checked == true) {
				usage = zradio[i].value
			}
		}
	}
//calcul
	if (typemat == 'musique') {
		if (duree == '2mois') {
			if (lieu == 'europe') {coeff = 1.25} else {coeff = 1.87}
		}
		else
		{
			if (lieu == 'europe') {coeff = 2.51} else {coeff = 3.93}
		}
	}
	if (typemat == 'photo') {
		if (usage == 'priv') {
			if (duree == '2mois') {
				if (lieu == 'europe') {coeff = 1.76} else {coeff = 2.51}
			}
			else
			{
				if (lieu == 'europe') {coeff = 3.52} else {coeff = 5.01}
			}
		}
		else
		{
			if (duree == '2mois') {
				if (lieu == 'europe') {coeff = 3.51} else {coeff = 4}
			}
			else
			{
				if (lieu == 'europe') {coeff = 7.02} else {coeff = 8.01}
			}
		}
	}
	if (typemat == 'video') {
		if (usage == 'priv') {
			if (duree == '2mois') {
				if (lieu == 'europe') {coeff = 1.99} else {coeff = 2.82}
			}
			else
			{
				if (lieu == 'europe') {coeff = 3.68} else {coeff = 5.63}
			}
		}
		else
		{
			if (duree == '2mois') {
				if (lieu == 'europe') {coeff = 3.95} else {coeff = 4.5}
			}
			else
			{
				if (lieu == 'europe') {coeff = 7.9} else {coeff = 9}
			}
		}
	}
	if (typemat == 'armes') {
		if (duree == '2mois') {
			if (lieu == 'europe') {coeff = 1.19} else {coeff = 1.54}
		}
		else
		{
			if (lieu == 'europe') {coeff = 2.38} else {coeff = 3.09}
		}
	}
	if (typemat == 'ordinateur') {
			if (lieu == 'europe') {coeff = 5}
			if (lieu == 'monde') {coeff = 6.25}
			if (lieu == 'fixe') {coeff = 2.51}
	}
	calc = mtdem * coeff / 100;
	if (calc < 76) {calc = 76}
	document.getElementById('montantfinal').innerHTML = 'Le montant de la cotisation est de <strong>'+calc+' &euro;</strong>';
}