Location Not Displayed When Using Geo location in HTML5

I'm developing a Phone Gap application. In that application I Want to show the current user's position. For that I used HTML5 geolocation. When I click on the Get Location button it doesn't display a location. It also doesn't display an error. After pressing the Get Location button it simply shows the button in the selected state.

<!DOCTYPE html>
    <button onclick="getLocation()">Get Location</button>
        var x = document.getElementById("demo");
        function getLocation() {
            if (navigator.geolocation) {
                navigator.geolocation.getCurrentPosition(showPosition, showError);
            else { x.innerHTML = "Geolocation is not supported by this browser."; }
        function showPosition(position) {
            x.innerHTML = "Latitude: " + position.coords.latitude + "<br>Longitude: " + position.coords.longitude;
        function showError(error) {
            switch (error.code) {
                case error.PERMISSION_DENIED:
                    x.innerHTML = "User denied the request for Geolocation."
                case error.POSITION_UNAVAILABLE:
                    x.innerHTML = "Location information is unavailable."
                case error.TIMEOUT:
                    x.innerHTML = "The request to get user location timed out."
                case error.UNKNOWN_ERROR:
                    x.innerHTML = "An unknown error occurred."


You are referencing an element that doesn't exist. Add a div to your html body with id="demo", like so:

<div id="demo"></div>

See it here on jsfiddle: http://jsfiddle.net/wU6AE/

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