function calculate(Apr) {
document.calc.monthly.value=parseInt(((document.calc.balance.value * (document.calc.apr.value * .01))/12)*100)/100;
if (Apr==0){
  document.calc.transmonthly.value=0;
  }else{
  document.calc.transmonthly.value=parseInt(((document.calc.balance.value * (Apr*.01))/12)*100)/100;
  }
document.calc.savings.value=parseInt((document.calc.monthly.value - document.calc.transmonthly.value)*100)/100;
}