function loadMaps() {
  google.load("maps", "2", {"callback" : mapsLoaded});
}

function initLoader() {
  var script = document.createElement("script");
  script.src = "http://www.google.com/jsapi?key=ABQIAAAAw7Iwp8QdPifsC1Wxvp2jjRT0bhTk_ECr8SMCJ57wLjqypZcrqRQvtD8K-PE2fUZXx0Zv5jZTskV8Hg&callback=loadMaps";
  script.type = "text/javascript";
  document.getElementsByTagName("head")[0].appendChild(script);
}

function mapsLoaded(){
    if (GBrowserIsCompatible()) {
      	var address= document.getElementById("postcode").value;
		// Create new geocoding object
      var geocoder = new GClientGeocoder();
      // Retrieve location information from geocode, pass it to getCoordinates()
      geocoder.getLocations(address, getCoordinates);			
      }
		else {
			  alert("Sorry, the Google Maps API is not compatible with this browser");
		}
}
// This function retrieves the co ordinates
function getCoordinates(response){
	if(!response.Placemark){
		alert("Invalid Postcode");
	}
	else{
		// Retrieve the object
		var place = response.Placemark[0];
		
		// Retrieve the latitude and longitude
		document.getElementById('lat').value = place.Point.coordinates[1];
		document.getElementById('lng').value = place.Point.coordinates[0];
		//document.getElementById('postcode').value = place.address;
		document.getElementById('register_form').submit();
	}
}