function calculer(){

	var nb_personnes = document.getElementById('nb_personnes').value;
	
	var actuel = 25 * nb_personnes * 12;
	var conges = 10 * nb_personnes * 12;
	var gain = actuel - conges;
	var delay = 850 / 15 / nb_personnes;
	var delay_final = 0;
	
	delay_final = parseInt(delay.toFixed(0));
	
	if(delay_final - delay <= 0)
		delay_final = delay_final + 1;
	
	document.getElementById('actuel').innerHTML = actuel + " &euro;";
	document.getElementById('conges').innerHTML = conges + " &euro;";
	document.getElementById('gain').innerHTML = gain + " &euro;";
	document.getElementById('delay').innerHTML = delay_final + " mois";

}