function showpay() {

 var princ = document.calc.loan.value;
 var term  = document.calc.months.value;
 var intr   = 11.5 / 1200;
 var result = princ * intr / (1 - (Math.pow(1/(1 + intr), term)));
 var resultrnd=Math.round(result*100)/100;
 document.calc.pay.value = resultrnd;
 // document.calc.pay.value = princ
}