function calc(what)
{switch(what){case'mens':
T=document.monform.mens_taux.value.replace(',','.')/100;t=T/12;C=document.monform.mens_emprunt.value.replace(',','.');n=document.monform.mens_nbmens.value.replace(',','.');if(document.monform.mens_duree[1].checked)n*=12;document.monform.mens_mens.value=Math.round(100*C*(t/(1-(1/Math.pow(1+t,n)))))/100;document.monform.mens_cttotal.value=Math.round((100*C*(t/(1-(1/Math.pow(1+t,n)))))/100)*12*(Math.round(document.monform.mens_nbmens.value));document.monform.mens_ctcredit.value=(Math.round((100*C*(t/(1-(1/Math.pow(1+t,n)))))/100)*12*(Math.round(document.monform.mens_nbmens.value)))-(Math.round(document.monform.mens_emprunt.value));break;case'emprunt':
T=document.monform.emprunt_taux.value.replace(',','.')/100;t=T/12;n=document.monform.emprunt_nbmens.value.replace(',','.');if(document.monform.emprunt_duree[1].checked)n*=12;m=document.monform.emprunt_mens.value.replace(',','.');document.monform.emprunt_emprunt.value=Math.round(m*((1-(1/Math.pow(1+t,n)))/t));document.monform.emprunt_cttotal.value=Math.round((document.monform.emprunt_nbmens.value)*(document.monform.emprunt_mens.value)*12);document.monform.emprunt_ctcredit.value=Math.round((document.monform.emprunt_cttotal.value)-(document.monform.emprunt_emprunt.value));break;case'nbmens':
T=document.monform.nbmens_taux.value.replace(',','.')/100;t=T/12;C=document.monform.nbmens_emprunt.value.replace(',','.');m=document.monform.nbmens_mens.value.replace(',','.');document.monform.nbmens_nbmens.value=Math.round(Math.log(-1/(((C/m)*t)-1))/Math.log(1+t));document.monform.nbmens_nbmens.value+=' mois ('+Math.round(document.monform.nbmens_nbmens.value/12)+' an'+((Math.round(document.monform.nbmens_nbmens.value/12)>1)?'s':'')+')';document.monform.nbmens_cttotal.value=Math.round((document.monform.nbmens_mens.value)*(Math.round(Math.log(-1/(((C/m)*t)-1))/Math.log(1+t))));document.monform.nbmens_ctcredit.value=Math.round((document.monform.nbmens_cttotal.value)-(document.monform.nbmens_emprunt.value));break;};}