How to get the Australian Time Zone using Javascript

Question

I am trying to help a friend to get the Australian Time Zone for the University Assignment and finding difficulty. Could someone point us in the right direction? Thank you!

<script>
function Timezone() {
var x = new Date();
var currentTimeZoneOffsetInHours = x.getTimezoneOffset() / 60;
document.getElementById("add").innerHTML = currentTimeZoneOffsetInHours;
}
</script>

<p id="add"></p>