Attached image file has formula to add in javascript

Hello Guys,

I need some help. Attached is the formula image which I want to use in Javascript but I dont know how to do the superscript (n) in Javascript

Here is my code

<script>
function myFunction() {
var pmt;
var PV = 201508;
var i1 = 3.625;
var i2=3.625/100;
var i = i2/12;
var n= 360;

pmt = PV * i(1+ i)/(1 + i) - 1;
}
</script>

Code (markup):

Can someone tell me how I can use the attached formula image in javascript.

Thanks

Raj

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