/************************************************/	
	/* Fichier de la fonction Javascript permettant */
   /*    la gestion du simulateur-calculateur  	   */
	/************************************************/	


// Permet de gérer la simulation du calculateur de prêt immobilier
// Les fonction "conv" convertissent franc <-> euro
// les fonctions "Calc" gérent le calcul demandé, suivant les cas.


function ConvMonnaieMens(monnaie) {
 
   coef = 6.55957;
   if (monnaie == 'E') {
      // monnaie = euro
      document.formSimulation.pret1.value = Math.round(document.formSimulation.pret1.value/coef); 
      document.formSimulation.mensualite1.value = Math.round(document.formSimulation.mensualite1.value/coef);
   }
   if (monnaie == 'F') {
      // monnaie = franc
      document.formSimulation.pret1.value = Math.round(document.formSimulation.pret1.value*coef); 
      document.formSimulation.mensualite1.value = Math.round(document.formSimulation.mensualite1.value*coef);
   }    
}

function CalcMens() {
   
   Taux = document.formSimulation.taux1.value.replace(',','.')/100;
   taux = Taux/12;
   Duree = document.formSimulation.duree1.value.replace(',','.');
   duree = Duree*12;
   emprunt = document.formSimulation.pret1.value.replace(',','.');  
   document.formSimulation.mensualite1.value = Math.round(100*emprunt*(taux/(1-(1/Math.pow(1+taux,duree)))))/100;
}

function ConvMonnaiePret(monnaie) {
 
   coef = 6.55957;
   if (monnaie == 'E') {
      // monnaie = euro
      document.formSimulation.pret2.value = Math.round(document.formSimulation.pret2.value/coef); 
      document.formSimulation.mensualite2.value = Math.round(document.formSimulation.mensualite2.value/coef);
   }
   if (monnaie == 'F') {
      // monnaie = franc
      document.formSimulation.pret2.value = Math.round(document.formSimulation.pret2.value*coef); 
      document.formSimulation.mensualite2.value = Math.round(document.formSimulation.mensualite2.value*coef);
   }    
}

function CalcPret() {
      
   Taux = document.formSimulation.taux2.value.replace(',','.')/100;
   taux = Taux/12;
   Duree = document.formSimulation.duree2.value.replace(',','.');
   duree = Duree*12;
   mensualite = document.formSimulation.mensualite2.value.replace(',','.');
   document.formSimulation.pret2.value = Math.round(mensualite*((1-(1/Math.pow(1+taux,duree)))/taux));
}

function ConvMonnaieDuree(monnaie) {
 
   coef = 6.55957;
   if (monnaie == 'E') {
      // monnaie = euro
      document.formSimulation.pret3.value = Math.round(document.formSimulation.pret3.value/coef); 
      document.formSimulation.mensualite3.value = Math.round(document.formSimulation.mensualite3.value/coef);
   }
   if (monnaie == 'F') {
      // monnaie = franc
      document.formSimulation.pret3.value = Math.round(document.formSimulation.pret3.value*coef); 
      document.formSimulation.mensualite3.value = Math.round(document.formSimulation.mensualite3.value*coef);
   }    
}

function CalcDuree() {
    
   Taux = document.formSimulation.taux3.value.replace(',','.')/100;
   taux = Taux/12;
   emprunt = document.formSimulation.pret3.value.replace(',','.');
   mensualite = document.formSimulation.mensualite3.value.replace(',','.');
   // durée en mois
   dureeMois = Math.round(Math.log(-1/(((emprunt/mensualite)*taux)-1))/Math.log(1+taux));
   document.formSimulation.duree3.value = (Math.round((dureeMois/12)*10))/10;
}