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

function docal()
{
  var mi = document.temps.interestRate.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.temps.loanLength.value * 12; i++)
  {
    base = base * mbase
  }
  document.temps.monthlyPrinciple.value = floor(document.temps.loanAmount.value * mi / ( 1 - (1/base)))
  document.temps.monthlyTax.value = floor(document.temps.annualPropertyTax.value / 12)
  document.temps.monthlyInsurance.value = floor(document.temps.annualInsurance.value / 12)
  var dasum = document.temps.loanAmount.value * mi / ( 1 - (1/base)) +
        document.temps.annualPropertyTax.value / 12 + 
        document.temps.annualInsurance.value / 12;
  document.temps.totalPayment.value = floor(dasum);
}