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

function dosum(){
	var mi = document.main.InterestRate.value / 1200;
	var base = 1;
	var mbase = 1 + mi;

	for (i=0; i<document.main.YearsForMortgage.value * 12; i++){
		base = base * mbase
	}

	document.main.PI.value = floor(String(document.main.BorrowAmount.value).replace(/\D/g,'') * mi / ( 1 - (1/base)))
	document.main.MT.value = floor(document.main.AnnualPropTax.value / 12)
	document.main.MI.value = floor(document.main.AnnualInsurance.value / 12)

	var dasum = String(document.main.BorrowAmount.value).replace(/\D/g,'') * mi / ( 1 - (1/base)) +

	document.main.AnnualPropTax.value / 12 + 
	document.main.AnnualInsurance.value / 12;
	document.main.MP.value = floor(dasum);
}