function PhysikCalc(){
var Result;
vala = eval(document.spweight.vala.value);
valb = eval(document.spweight.valb.value);

if((vala > 0) && (valb > 0)){

	Result = FormatNumber(vala / valb);
	
	document.getElementById("result").innerHTML = "Résultat<br>" + Result + " g/cm<sup>3</sup>";
}

}