//function hidePmtResult(){
//this hide function is in the bodyOnloadHideAll function for the to work with multiple onload functions
//document.getElementById("pmtResult").innerHTML = "";
//}
function calculate() {
// Get the user's input from the form. Assume it is all valid.
// Convert interest from a percentage to a decimal, and convert from
// an annual rate to a monthly rate. Convert payment period in years
// to the number of monthly payments.
var purchasePrice = document.loanpmt.purchasePrice.value;
var downpmt = document.loanpmt.downpmt.value;
var interest = document.loanpmt.interest.value;
var months = document.loanpmt.months.value;
var term = months / 12;
var IN = interest /12;
var PE = months;
if (isNaN(downpmt)) {
downpmt =0;
}
var PR = purchasePrice - downpmt;
var payment = (PR * IN) / (1 - Math.pow(1 + IN, -PE));
// Check that the result is a finite number. If so, display the results
if (!isNaN(payment) && (payment != Number.POSITIVE_INFINITY) && (payment != Number.NEGATIVE_INFINITY)
) {
//show results in div
//document.getElementById("result").innerHTML = "Your result is "+round((monthly * payments) - principal);
document.getElementById("pmtResult").innerHTML = "Amount of the loan:\t$" + PR + "
" +
"Annual interest rate:\t" + interest * 100 + "%
" +
"Term of the loan:\t" + term + " years
" +
"Monthly payment:\t$" + round(payment)+"
This payment does not take into account the sales tax you will be charged and any additional fees you may have to pay ";
}
// Otherwise, the user's input was probably invalid, so don't
// display anything.
else {
document.getElementById("pmtResult").innerHTML = "Please check your values for a proper calculation ";
}
}
function addCommas(nStr)
{
nStr += '';
x = nStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
function round(x) {
// This simple method rounds a number to two decimal places.
return Math.round(x*100)/100;
//rounds up to a whole number
//return Math.round(x);
}