// Give the estimated location based on the IP address.

cb = function (data) {
    var loc = data.city;
    if (data.region_name.length > 0)
        loc = loc + ', ' + data.region_name;
    console.log('IP address: ' + data.ip);
    console.log('Estimated location: ' + loc);
    phantom.exit();
};

var el = document.createElement('script');
el.src = 'http://freegeoip.net/json/?callback=cb';
document.body.appendChild(el);