var map;

//initialize map 
function InitMap(start_x, start_y, zoom_level) {
  map = new GMap2(document.getElementById('gmap_page1'));
	//map.addControl(new GSmallMapControl());
	//map.addControl(new GMapTypeControl());
	map.setCenter(new GLatLng(start_y, start_x), zoom_level);
	var marker = new GMarker(map.getCenter()); 
}