Set a Date based on the value of another date + 1 year

Set a Date based on the value of another date + 1 year

I have 2 inputs:

<input type="text" name="EffectiveDate" id="EffectiveDate" />
<input type="text" name="ExpirationDate" id="ExpirationDate" />

Expiration date needs to be set to the value of  EffectiveDate + 1 Year.

Input is in the format mm/dd/yyyy and required to be as such.

I started out with the script below:

$(document).ready(function() {
$("#EffectiveDate").change(function () {
var d = new Date();
d.setDate(d.getDate());
$("#ExpirationDate").val(formatDate(_date));
});
function formatDate(date) {
            var day = date.getDate();
            var month = date.getMonth() + 1;
            var year = date.getFullYear() + 1;

            if (day < 10) day = "0" + day;
            if (month < 10) month = "0" + month;

            return day + "/" + month + "/" + year;
}

Could someone please assist me with getting the ExpirationDate to populate correctly.

Thank you in advance,

Joe Scarpetta
Apphia Solutions, LLC