function futCalcWeight(form) {

	var divider = 4000;
	var volw;
	
	volw = document.volcalc.pwidth.value * document.volcalc.plength.value * document.volcalc.pheight.value / divider;
	
	document.volcalc.volweight.value = Math.round(volw*100)/100 + " kg";
	
	return false;
 
}