JavaScript Latitude dan Longitude

<script type='text/javascript'>
var x;
function getLocation(){
if(navigator.geolocation){
navigator.geolocation.getCurrentPosition(showPosition);
}else{
x="Ga Support";
alert(x);
}
}
function showPosition(position){
x=position.coords.latitude+", "+position.coords.longitude;
alert(x);
}
getLocation();
</script>