var map;
var geoXml;
var toggleState = 0;

function initialize() {
  if (GBrowserIsCompatible()) {
    geoXml = new GGeoXml("http://minkmachine.reine.se/transsib2.kml");
    map = new GMap2(document.getElementById("map"));
    map.setCenter(new GLatLng(54.162434,75.234375), 2);
	map.setMapType(G_PHYSICAL_MAP);
    map.addControl(new GLargeMapControl());
    map.addControl(new GLargeMapControl());
    map.addOverlay(geoXml);
  }
}

function toggleMyKml() {
  if (toggleState == 1) {
    map.removeOverlay(geoXml);
    toggleState = 0;
  } else {
    map.addOverlay(geoXml);
    toggleState = 1;
  }
}