function GeoCalc(){
var Volum;
side = eval(document.cubediag.side.value);


if(side > 0){

	Volum = FormatNumber(Math.sqrt(Math.pow((Math.sqrt(2) * side),2) + Math.pow(side,2)));
	
	document.getElementById("volume").innerHTML = "Longueur<br />" + Volum + "  cm<br />" + FormatNumber(Volum/100) + "  m<br />";
}

}