Perhaps this would have been better placed in the Javascript, but I felt it'd get a better response here.

I have an XML file with the following values in:

'postcode' (zip code in UK) stored in a db
'username' - username stored in a db

All I'm trying to do is display the contents of the XML file via Google Maps, so that a marker appears on every postcode. I'm getting a weird error that causes the Google Maps marker to appear 5 miles out to sea... Anyone know why this could be? Here is my code.

    <script type="text/javascript">
    //<![CDATA[

    var iconBlue = new GIcon(); 
    iconBlue.image = 'http://labs.google.com/ridefinder/images/mm_20_blue.png';
    iconBlue.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
    iconBlue.iconSize = new GSize(12, 20);
    iconBlue.shadowSize = new GSize(22, 20);
    iconBlue.iconAnchor = new GPoint(6, 20);
    iconBlue.infoWindowAnchor = new GPoint(5, 1);


    function load() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map"));
        map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());
        map.setCenter(new GLatLng(50, -0.0), 8);

        GDownloadUrl("genxml.php", function(data) {
          var xml = GXml.parse(data);
          var markers = xml.documentElement.getElementsByTagName("marker");
          for (var i = 0; i < markers.length; i++) {
            var name = markers[i].getAttribute("postcode");
            var marker = createMarker(name);
            map.addOverlay(marker);
          }
        });
      }
    }

    function createMarker(name) {
      var marker = new GMarker;
      var html = "<b>" + name + "</b> <br/>";
      GEvent.addListener(marker, 'click', function() {
        marker.openInfoWindowHtml(html);
      });
      return marker;
    }
    //]]>
  </script>

The XML file is fine, and is called genxml.php above.

On the strength of information given ....


absolutely no idea.