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