function calculermensualite(action) {
		var action = action;
		var form = document.forms['mensualite'];
		var montant = parseInt(form.mMontant.value);
    var duree = parseInt(form.mDuree.value) * 12;
    var taux = parseFloat(form.mTaux.value) / 100 / 12;
		var mensualite = montant * taux / (1 - Math.pow(1 / (1 + taux), duree));
		var couttotal = mensualite * duree;
		var interets = couttotal - montant;
    if (mensualite > 0) {
        document.getElementById("mMensualite").innerHTML = (Math.round(mensualite*100))/100 + " €/mois";
        document.getElementById("mInterets").innerHTML = (Math.round(interets*100))/100 + " €";
        document.getElementById("mCoutTotal").innerHTML = (Math.round(couttotal*100))/100 + " €";
    }
    else {
        document.getElementById("mMensualite").innerHTML = "";
        document.getElementById("mInterets").innerHTML = "";
        document.getElementById("mCoutTotal").innerHTML = "";
				if (action=="calcul") {
					 document.getElementById("mMensualite").innerHTML = "<span class=\"erreur\">Donn&eacute;es invalides</span>";
				}
    }
		return false;
}

function calculercapacite(action) {
		var action = action;
		var form = document.forms['capacite'];
		var mensualite = parseInt(form.cMensualite.value);
    var duree = parseInt(form.cDuree.value) * 12;
    var taux = parseFloat(form.cTaux.value) / 100 / 12;
		var montant = mensualite * (1 - Math.pow(1 / (1 + taux), duree)) / taux;
		var totalcredit = mensualite * duree;
		var interets = totalcredit - montant;
		if (montant > 0) {
        document.getElementById("cMontant").innerHTML = (Math.round(montant*100))/100 + "&nbsp;&euro;";
        document.getElementById("cInterets").innerHTML = (Math.round(interets*100))/100 + "&nbsp;&euro;";
        document.getElementById("cTotalCredit").innerHTML = (Math.round(totalcredit*100))/100 + "&nbsp;&euro;";
		}
		else {
        document.getElementById("cMontant").innerHTML = "";
        document.getElementById("cInterets").innerHTML = "";
        document.getElementById("cTotalCredit").innerHTML = "";
				if (action=="calcul") {
					 document.getElementById("cMontant").innerHTML = "<span class=\"erreur\">Donn&eacute;es invalides</span>";
				}
		}
		return false;
}

function calculerendettement(action) {
		var action = action;
		var form = document.forms['endettement'];
		var salaires = parseInt(form.eSalaires.value);
		var revenus = parseInt(form.eRevenus.value);
		var charges = parseInt(form.eCharges.value);
		if (isNaN(salaires)) {salaires = 0;}
		if (isNaN(revenus)) {revenus = 0;}
		if (isNaN(charges)) {charges = 0;}
		if ((salaires + revenus) > 0) {
			var taux;
			taux = (Math.abs(charges) / (salaires + revenus)) * 100;
			document.getElementById("eEndettement").innerHTML = (Math.round(taux*100))/100 + "&nbsp;%";
		} else {
				document.getElementById("eEndettement").innerHTML = "";
				if (action == "calcul") {
			 		document.getElementById("eEndettement").innerHTML = "<span class=\"erreur\">Donn&eacute;es invalides</span>";
				}
		}
		return false;
}