<script>
var x = document.getElementById("demo");
function getLocation() {

  if (navigator.geolocation) {
    navigator.geolocation.watchPosition(showPosition);
  } else {

    x.innerHTML = "Geolocation is not supported by this browser.";

  }
}

function showPosition(position) {
  x.innerHTML = "Latitude: " + position.coords.latitude +
  "<br>Longitude: " + position.coords.longitude;

}
</script>