Geolocate users with modern browsers (or with Google Gears)

geolocation.js

  var geo = navigator.geolocation || (window.google && google.gears && google.gears.factory.create('beta.geolocation'));
  if (geo) geo.getCurrentPosition(displayLocation, handleError);
  
  function displayLocation(position) {
    position.coords.latitude;
    position.coords.longitude;
    position.coords.accuracy;
  }
  
  function handleError(error) {
    switch (error.code) {
      case error.PERMISSION_DENIED:
        alert('Sorry. Permission to find your location has been denied.');
        break;
      case error.POSITION_UNAVAILABLE:
        alert('Sorry. Position unavailable.');
        break;
      default:
        alert('Error code: ' + error.code);
    }
  }