Show two decimals

I have this code in the onChange event. How do I set it to show to decimals?

var f = document.forms[0]

cal1 = parseFloat(f.Ant1.value * 49);

cal2 = parseFloat(f.Ant2.value * 2.85);

cal3 = parseFloat(f.Ant3.value * 15.50);

cal4 =parseFloat( f.Ant4.value * 2.95);

calSum = cal1 + cal2 + cal3 + cal4;

f.Sum.value = parseFloat(calSum)

Subject: powers of 10 with Math.round

It seems wrong that Math.round in JavaScript would not take the second argument that the LotusScript round() and @Round take to allow the developer to specify the number of decimal places, but since it doesn’t seem to, we can have fun with powers of 10, like this:

f.Sum.value = Math.round (calSum*100)/100