var gmarkers=[];
var icons=[];
var map;
var bounds = new GBounds(Number.MAX_VALUE, Number.MAX_VALUE, -Number.MAX_VALUE, -Number.MAX_VALUE); 
var baseIcon = new GIcon();
baseIcon.shadow = graphic_path + "templates/graphics/mm_20_red.png";
baseIcon.transparent = graphic_path + "templates/graphics/mm_20_transparent.png";
baseIcon.iconSize = new GSize(12, 20);
baseIcon.shadowSize = new GSize(12, 20);
baseIcon.iconAnchor = new GPoint(12, 20);
baseIcon.infoWindowAnchor = new GPoint(5, 1);

function get_radio_value() {
    var radios = document.search_form.elements.change_region; 
    for (var i=-1, radio; radio=radios[++i];) 
        if(radio.checked) location.href='locator.php?geo_region=' + radio.value;
}

function set_radio_value() {
    var radios = document.search_form.elements.change_region; 
    for (var i=-1, radio; radio=radios[++i];) {alert(radio.value);
        if(radio.value == document.search_form.geo_region.value) {
					document.search_form.elements.change_region.value.checked = true;
					alert(document.search_form.elements.change_region.value);
				}
		}
}

function set_init_view(world_view) {
	switch (world_view){
		case 'us': 
			lat = 38.75416131535263;
			lng = -96.9848110961914;
			zoom = 4;
		break;
		case 'ca': 
			lat = 61.270232790000605;
			lng = -97.734375;
			zoom = 3;
		break;
		case 'na': 
			lat = 61.270232790000605;
			lng = -97.734375;
			zoom = 2;
		break;
		case 'in': 
			lat = 35.6180165487737;
			lng = 5.625;
			zoom = 1;
		break;
	}
	init_view(lat,lng, zoom);
}

function init_view(lat, lng, zoom) {
		map.setCenter(new GLatLng(lat,lng), zoom);
}	

function color_of_icon(iconColor) {
   var color;
   if ((typeof(iconColor)=="undefined") || (iconColor==null)) { 
      color = "gray" 
   } else { 
      color = iconColor; 
   }
   if (!icons[iconColor]) {
      var icon = new GIcon(baseIcon);
      icon.image = graphic_path + "templates/graphics/mm_20_"+ color +".png";
      icons[iconColor]=icon;

  } 
   return icons[iconColor];
}

GMap2.prototype.centerAndZoomOnBounds = function(bounds) {
   var span = new GSize(bounds.maxX - bounds.minX, bounds.maxY - bounds.minY);
	 var center = new GLatLng(bounds.minY + span.height / 2., bounds.minX + span.width / 2.);
		sw = new GLatLng(bounds.maxY, bounds.minX);
		ne = new GLatLng(bounds.minY, bounds.maxX);
		b = new GLatLngBounds(sw, ne);
		newZoom = map.getBoundsZoomLevel(b);

   if (map.getZoom() != newZoom) {
       map.setCenter(center, newZoom);
   } else {
			map.setCenter(center);
   }
}

function addMarker(lng, lat, title, iconStr, yb) {
   var point = new GPoint(lng, lat);
   bounds.extend(point);
   var icon = color_of_icon(iconStr);
   var marker = new GMarker(point, icon);
   gmarkers.push(marker);
   marker.type = iconStr; 
   GEvent.addListener(marker, "click", function () {
//      var text = "<div align=center>"+title +"<BR> <BR><a href=" + marker_link + yb + ">details...</a></div>";
      var text = "<div align=center>"+title +"</div>";
      marker.openInfoWindowHtml(text);
   });
   map.addOverlay(marker);
}

function add_point_of_entry(lng, lat) {
	arrow_point = new GPoint(lng, lat);
  bounds.extend(arrow_point);
	arrow_icon = new GIcon();
	arrow_icon.image = graphic_path + "templates/graphics/arrow.png";
	arrow_icon.shadow = graphic_path + "templates/graphics/arrowshadow.png";
	arrow_icon.iconSize = new GSize(39, 34);
	arrow_icon.shadowSize = new GSize(39, 34);
	arrow_icon.iconAnchor = new GPoint(10, 34);
	arrow_icon.transparent = graphic_path + "templates/graphics/arrowtransparent.png";
  arrow_marker = new GMarker(arrow_point, arrow_icon);
  map.addOverlay(arrow_marker);
}

function processMarkers() {
	start = 0;
	init_view(location_list[0][1],location_list[0][0], 16)
	if(document.search_form.geo_region.value != 'in') {
		lng = location_list[0][0];
		lat = location_list[0][1];
		add_point_of_entry(lng,lat);
		start++;
	}

	for (var i=start; i < location_list.length; i++) {
		lng = location_list[i][0];
		lat = location_list[i][1];
		title = location_list[i][2];
		color = location_list[i][3];
		year_built = location_list[i][4];
		addMarker(lng,lat,title,color,year_built);
		}
	map.centerAndZoomOnBounds(bounds);
} 

function plot_locations() {
  map = new GMap2(document.getElementById("map")); 
	map.addControl(new GLargeMapControl());
	map.addControl(new GMapTypeControl());

	if (location_list.length > 0) processMarkers();
	else set_init_view(document.search_form.geo_region.value);
}

function load() {
	var locations = new plot_locations();
	if(document.search_form.geo_region.value == 'in') set_init_view('in');
//	else set_radio_value();
}