var centerLatitude = 51.505644;
var centerLongitude = 0.138874;
var startZoom = 12;

var map;

function init()
{
	if (GBrowserIsCompatible()) {
		map = new GMap2(document.getElementById("map"));
		var location = new GLatLng(centerLatitude, centerLongitude);
		map.setCenter(location, startZoom);
	}
}
window.onload = init;
window.onunload = GUnload;