jQuery Simple Example

HTML

<script src="//www.addressfinder.co.nz/assets/v2/widget.js"></script>

CSS

body {
    padding: 5px;
}

label {
    font-weight: bold;
}

input[type=text] {
    width: 20em
}

p {
    margin: 1em 0 0;
}

JavaScript

var list1 = [6, 7, 3, 4, 1, 2];
var list2 = [2, 4, 6, 5, 1, 9, 8, 7, 8];
var newArray = [];
$.each(list1, function(i, value) {
console.log($.inArray(value, list2));
  if ($.inArray(value, list2) == -1) {
    newArray.push(value);
  }
});
$.each(list2, function(i, value) {
  if ($.inArray(value, list1) == -1) {
    newArray.push(value);
  }
});
console.log(newArray);