var map;  
a = 0;

var icon = new GIcon();
icon.image = "http://www.google.com/mapfiles/marker.png";
icon.shadow = "http://www.google.com/mapfiles/shadow50.png";
icon.iconSize = new GSize(20, 34);
icon.shadowSize = new GSize(37, 34);
icon.iconAnchor = new GPoint(10, 34);

var localSearch = new GlocalSearch();


function usePointFromPostcode(postcode, callbackFunction) {   

	localSearch.setSearchCompleteCallback(null, 
		function() {                  
			
			if (localSearch.results[0]){               
            		
				var resultLat = localSearch.results[0].lat;
				var resultLng = localSearch.results[0].lng;
				var point = new GLatLng(resultLat,resultLng);                
				callbackFunction(point);
                placeMarkerAtPoint(point);                                  
			}else{
				if(alertUser == TRUE) { 
                    alert("Postcode not found!"); 
                }
			}
		});	
		
	localSearch.execute(postcode + ", UK");
}

function placeMarkerAtPoint(point)
{       
	
    var marker = new GMarker(point,icon);
	map.addOverlay(marker);
}

function setCenterToPoint(point)
{    
        mapLoad();
    	map.setCenter(point, 16); 
}

function showPointLatLng(point)
{
	alert("Latitude: " + point.lat() + "\nLongitude: " + point.lng());
}

function mapLoad() { 
    if(a == 0) {  
	    if (GBrowserIsCompatible()) {
		    map = new GMap2(document.getElementById("map"));            
            map.addControl(new GSmallZoomControl);                                 
		    map.setCenter(new GLatLng(54.622978,-2.592773), 5, G_HYBRID_MAP);
	    }
        a++;
    }
    
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function addUnLoadEvent(func) {
	var oldonunload = window.onunload;
	if (typeof window.onunload != 'function') {
	  window.onunload = func;
	} else {
	  window.onunload = function() {
	    oldonunload();
	    func();
	  }
	}
}

addLoadEvent(mapLoad);
addUnLoadEvent(GUnload);