//Google maps
function load () {
	
	var map = document.getElementById("googleMap");
	
	if (GBrowserIsCompatible()) {

		var gmap = new GMap2(map);
		gmap.addControl( new GSmallMapControl() );
		//gmap.addControl( new GMapTypeControl()) ;
		gmap.addControl( new GOverviewMapControl(new GSize(100,100)) );		
		gmap.setCenter ( new GLatLng(53.993189, -1.546497), 15);
					
		function formatWindow (input) {				
			var html 	 = "<div class=\"bubble\">";
			html 		+= "<h2>" + input.place + "</h2>";			
			html 		+= "<p>" + input.information + "</p>";
			html 		+= "</div>";					
			return html;			
		}			
		
	    function createMarker(input) {		
			var marker = new GMarker(input.point);	
			//required to open bubble on load in conjunction with below
			gmap.addOverlay(marker);
			GEvent.addListener(marker, "click", function() {
			marker.openInfoWindowHtml( formatWindow(input) );
		 });
			//opens bubble on load
			marker.openInfoWindowHtml(formatWindow(input) );
		return marker;
		}
		
		function parseJson (doc) {						
			var jsonData = eval("(" + doc + ")");					
	        for (var i = 0; i < jsonData.markers.length; i++) {
				var marker = createMarker(jsonData.markers[i]);
				gmap.addOverlay(marker);
				}			
			}
			
		GDownloadUrl("points.json", function(data, responseCode) { 
			parseJson(data);
		});
	
	} else {
		alert("Sorry, your browser is not compatible with Google Maps");
	}
}
window.onload = load;
window.onunload = GUnload;