<!-- Begin
var i = 0; // interest
var m = 0; // months
var f = 0; // factor
var den = 0; 
var s = "0"; // string
var d = 0; // decimal place
function CalcA(form) {
if(form.interest.value=="" || form.months.value=="" || form.payment.value=="") {
alert("Please fill in all of the required fields.");
}
else { 
if(form.period.options[1].selected == true) {
m = form.months.value * 12;
}
else {
m = form.months.value;
} 
i = Math.pow(((form.interest.value/100)+1),.0833333)-1;
den = i / (i+1);
f = Math.pow((i+1),m)-1;
f /= den;
f *= form.payment.value;
d = String(f).indexOf(".");
s = String(f).substring(0,(d+3));
form.total.value = "$" + s;  
   }
}
//  End -->