function floor(number)
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
  var mi = document.calc.INTEREST.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.calc.YEAR.value * 12; i++)
  {
    base = base * mbase
  }

  var dasum = (document.calc.LOAN.value * mi / ( 1 - (1/base))) +
		(document.calc.LOAN.value * .0125 / 12) +
		(document.calc.LOAN.value *.0035 / 12);
  document.calc.MP.value = floor(dasum);
}