var window_left = (screen.availWidth /2) - 275
var window_top = (screen.availHeight / 2) - 225
var window_description = "scrollbars=1,height=450,width=550,left=" + window_left + 
",top=" + window_top 

var window_left2 = (screen.availWidth /2) - 300
var window_top2 = (screen.availHeight / 2) - 250
var window_description2 = "scrollbars=1,height=500,width=600,left=" + window_left2 + 
",top=" + window_top2 

var window_left3 = (screen.availWidth /2) - 150
var window_top3 = (screen.availHeight / 2) - 150
var window_description3 = "scrollbars=0,height=300,width=300,left=" + window_left3 + 
",top=" + window_top3 

var window_left4 = (screen.availWidth /2) - 150
var window_top4 = (screen.availHeight / 2) - 65
var window_description4 = "scrollbars=0,height=130,width=300,left=" + window_left4 + 
",top=" + window_top4 

var window_left5 = (screen.availWidth /2) - 245
var window_top5 = (screen.availHeight / 2) - 225
var window_description5 = "scrollbars=1,height=450,width=490,left=" + window_left5 + 
",top=" + window_top5 


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);

}
function xit(){
question_window = window.open("xit.htm", "", 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=300,height=135,left = 250,top = 250')
}

var win=null;
function NewWindow(mypage,myname,w,h,pos,infocus){
if(pos=="random"){myleft=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;mytop=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
if(pos=="center"){myleft=(screen.width)?(screen.width-w)/2:100;mytop=(screen.height)?(screen.height-h)/2:100;}
else if((pos!='center' && pos!="random") || pos==null){myleft=0;mytop=20}
settings="width=" + w + ",height=" + h + ",top=" + mytop + ",left=" + myleft + ",scrollbars=yes,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no";
win=window.open(mypage,myname,settings);
win.focus();}