var map;
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);
			}else{
				//alert("Postcode not found!");
			}
		});	
	
	var country = "US";
	if(document.getElementById("countryIdName") != null)
	{
		if(document.getElementById("countryIdName").selectedIndex != 0)
		{
			country = document.getElementById("countryIdName").value;
		}
		
		localSearch.execute(postcode + "," + country);
	}
	else
	{
		localSearch.execute(postcode);
	}
}

function setCenterToPoint(point)
{
	map.setCenter(point, 17);
}

var KMS = {
	label: "km",
	f : function (distance) {
			return distance / 1000;
	}
}

// Utility function for converting degrees to radians
Math.deg2rad = function ( x ) {
        return x * (Math.PI / 180.0); 
}

// Distance in metres
var EARTH_RADIUS = 6367000;

// Calculates the distance (in metres) between 2 points. 
function distance_between_points ( p1, p2 ) {
        var a = Math.deg2rad( 90 - p1.y);
        var b = Math.deg2rad( 90 - p2.y);
        var theta = Math.deg2rad( p2.x - p1.x);
        var c = Math.acos( Math.cos(a) * Math.cos(b) + Math.sin(a) * Math.sin(b) * Math
.cos(theta));

        return c * EARTH_RADIUS; 
}

function showPointLatLng(point)
{
	var lat = document.getElementById("txtLat");
	var lng = document.getElementById("txtLng");
	
	lat.value = point.lat();
	lng.value = point.lng();
	
	var fm = document.getElementById("fmSearch");
	fm.submit();
}

function showPointLatLngNoSubmit(point)
{
	var lat = document.getElementById("txtLat");
	var lng = document.getElementById("txtLng");
	
	lat.value = point.lat();
	lng.value = point.lng();
}

function mapLoad() {
	if(document.getElementById("map")!=null)
	{
		if (GBrowserIsCompatible()) {
			map = new GMap2(document.getElementById("map"));
			
			
			map.addControl(new GLargeMapControl());
			map.addControl(new GMapTypeControl());
			map.setCenter(new GLatLng(54.622978,-2.592773), 5, G_HYBRID_MAP);
		}
	}
}

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);

var MILES = {
	label : "miles",
	f : function (distance) {
			return distance / 1609.344;
	}
}