function floor(number)
	{
  	return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
	}
	
	function dosum()
	{
  	var mi = document.temps.IR.value / 1200;
  	var base = 1;
  	var mbase = 1 + mi;
  	for (i=0; i<document.temps.YR.value * 12; i++)
  	{
    	base = base * mbase
  	}
  	document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
  	document.temps.MT.value = floor(document.temps.AT.value / 12)
  	document.temps.MI.value = floor(document.temps.AI.value / 12)
  	var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
		document.temps.AT.value / 12 + 
		document.temps.AI.value / 12;
  		document.temps.MP.value = floor(dasum);
	}