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

function dosum()
{
  var loan_form = document.forms['temps'];
  var mi = loan_form.IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (var i=0; i < loan_form.YR.value * 12; i++)
  {
    base = base * mbase;
  }
  loan_form.PI.value = floor(loan_form.LA.value * mi / ( 1 - (1/base)));
  $('PI_span').setHTML(loan_form.PI.value);
  loan_form.MT.value = floor(loan_form.AT.value / 12);
  loan_form.MI.value = floor(loan_form.AI.value / 12);
  var dasum = loan_form.LA.value * mi / ( 1 - (1/base)) +
        loan_form.AT.value / 12 + 
        loan_form.AI.value / 12;
  loan_form.MP.value = floor(dasum);
  loan_form.FI.value = floor((loan_form.PI.value * 12) / 26);
  $('FI_span').setHTML(floor((loan_form.PI.value * 12) / 26));
}
//]]>