function loadGmap(a,b,c,d){ 
if (GBrowserIsCompatible()) {
	var map = new GMap2(document.getElementById("Gmap"));
	map.addControl(new GLargeMapControl());
	var point = new GLatLng(a,b);
	map.setCenter(point, c);

	var marker = new GMarker(point);
	var html = d;
	map.addOverlay(marker);
	marker.openInfoWindowHtml(html);

	GEvent.addListener(map, 'click', function(overlay, point) {
			if (overlay) {
			overlay.openInfoWindowHtml(html);
			}
		});
	}
}