function calc()
	{
	var scaleByXAnswer = (Math.round((document.forms[0].startScaleMenu.value)/(document.forms[0].endScaleMenu.value)*10000))/10000;
	var scaleByPerAnswer = (Math.round(100*(document.forms[0].startScaleMenu.value)/(document.forms[0].endScaleMenu.value)*100))/100;
	document.getElementById("answer").innerHTML = "Scale by " + scaleByXAnswer + "x or zoom " + scaleByPerAnswer + "%.";
}