var taux_tva=19.6;function passeHT(val){result=val/(1+(taux_tva/100));return result;};function arrondi(valeur,decimale){if((!decimale)&&(decimale!=0)){decimale=2;};resultat=Math.round(valeur*Math.pow(10,decimale))/Math.pow(10,decimale);return resultat;};function passeTTC(val){result=arrondi(val*(1+(taux_tva/100)),2);return result;};function getTauxTVA(){return taux_tva;};