//<script language="JavaScript">

function init() {
	//names = new MakeArray(5);
	//names[0]="RT 2000"
	//names[1]="très bonne";
	//names[2]="bonne";
	//names[3]="moyenne";
	//names[4]="inexistante";
		change = new MakeArray(5);
	change[0]="25";
	change[1]="30";
	change[2]="39";
	change[3]="54";
	change[4]="60";


	m2 = new MakeArray(20);
	m2[0]="10";
	m2[1]="20";
	m2[2]="30";
	m2[3]="40";
	m2[4]="50";
	m2[5]="60";
	m2[6]="70";
	m2[7]="80";
	m2[8]="90";
	m2[9]="100";
	m2[10]="110";
	m2[11]="120";
	m2[12]="130";
	m2[13]="140";
	m2[14]="150";
	m2[15]="160";
	m2[16]="170";
	m2[17]="180";
	m2[18]="190";
	m2[19]="200";

	hsp = new MakeArray(4);
	hsp[0]="2";
	hsp[1]="2.5";
	hsp[2]="3";
	hsp[3]="3.5";
	hsp[4]="4";
}
function MakeArray(n) {
	this.length = n;
	for (var i = 1; i <= n; i++) {
	this[i] = 0;
	}
	return this;
	}
function calculer(forms)
 {

var vol = m2[forms[1].surf.selectedIndex] * hsp[forms[1].haut.selectedIndex];

var p1 = (vol*change[forms[0].iso.selectedIndex]);
//result= (parseInt(p1));
forms[1].tot.value = "";

forms[1].tot.value = p1+ " watts ";

}


//</script>