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var lat; // define these just to 
var lon; // show asynchronicity
$.getJSON('', function(location) {
  console.log("\n\n\n\nlocation object from");
  var coords = location.loc.split(',')
  lat = coords[0]
  lon = coords[1]

  console.log("notice that JS gets here AFTER the last line of code");
  console.log("because the AJAX took a few seconds to get back");
  console.log("lat = " + lat + "   and lon = " + lon);

  var url = "" + lat + "&lon="  + lon;

  $.getJSON(url, function( data) {
    console.log("this comes last of all because it is the second asyncronous call,");
    console.log("it couldn't start until geolocation was back and then had to wait");
    console.log("again for it's own asynchronous call.\n");
    console.log("\ndata object from");
    console.log('\ndata from location...')
    console.log('lat =', lat, '   lon =', lon)
  }); // ajax
}); // navigator

console.log("undefined because JS reaches this code before the navigator.geolocation call gets back");
console.log("lat = " + lat + "   and lon = " + lon);