function initialize(eventCenter, overlay, requestId) {
	  if (GBrowserIsCompatible()) {
		var map = new GMap2(document.getElementById("map_canvas"));
		map.setCenter(new GLatLng(51.6900886, 5.3036905), 13);
		map.addControl(new GSmallMapControl());
		map.addControl(new GMapTypeControl());       
	
		// Add markers to the map at event locations if checked in ui
		var f = document.forms["cat_control"];
		

		//hoofdkaart op homepage
		for (id in vipbusEvents) {
		  //alert(vipbusEvents[id].cat);	
		  var point = new GLatLng(vipbusEvents[id].lat, vipbusEvents[id].lng);		
		 
		   if(vipbusEvents[id].cat == 1) {
			   map.addOverlay(createMarker(point, 1, vipbusEvents[id].name, vipbusEvents[id].date, vipbusEvents[id].time, vipbusEvents[id].descr, vipbusEvents[id].location, vipbusEvents[id].id));
		   }
		   
		  if(vipbusEvents[id].cat == 2) {
			  map.addOverlay(createMarker(point, 2, vipbusEvents[id].name, vipbusEvents[id].date, vipbusEvents[id].time, vipbusEvents[id].descr, vipbusEvents[id].location, vipbusEvents[id].id));
		  }
		 
		}
	  }
	}