function PanoramioLayerCallback(json, panoLayer) {
	this.panoLayer = panoLayer;
	var batch = [];
	for (var i = 0; i < json.photos.length; i++) {
		var photo = json.photos[i];
		if (!panoLayer.ids[photo.photo_id]) {
			var marker = this.createMarker(photo, panoLayer.markerIcon);
			panoLayer.mgr.addMarker(marker, 0);
			panoLayer.ids[photo.photo_id] = "exists";
		}
	}
	panoLayer.mgr.addMarkers(batch, panoLayer.map.getZoom());
	panoLayer.mgr.refresh();
}
PanoramioLayerCallback.prototype.formImgUrl = function(photoId, imgType) {
	return 'http://www.panoramio.com/photos/' + imgType + '/' + photoId + '.jpg';
}
PanoramioLayerCallback.prototype.formPageUrl = function(photoId) {
	return 'http://www.panoramio.com/photo/' + photoId;
}
PanoramioLayerCallback.prototype.createMarker = function(photo, baseIcon) {
	var me = this;
	var markerIcon = new GIcon(baseIcon);
	markerIcon.image = this.formImgUrl(photo.photo_id, "mini_square");
	var marker = new GMarker(new GLatLng(photo.latitude, photo.longitude), {icon: markerIcon, title: photo.photo_title});
	if (photo.photo_title.length > 33) {
		photo.photo_title = photo.photo_title.substring(0, 33) + "&#8230;";
	}
	var html = "<div id='infowin' style='height:320px; width:240px;'>" +
		"<div><a href='http://www.panoramio.com/' target='_blank'>" +
		"<img src='http://www.panoramio.com/img/logo-small.gif' border='0' width='119px' height='25px' alt='Panoramio logo' /><\/a></div>" +
		"<a id='photo_infowin' target='_blank' href='" + photo.photo_url + "'>" +
		"<img border='0' width='" + photo.width + "' height='" + photo.height + "' src='" + photo.photo_file_url + "'/><\/a>" +
		"<div style='overflow: hidden; width: 240px;'>" +
		"<div><a target='_blank' class='photo_title' href='" + photo.photo_url +
		"'><strong>" + photo.photo_title + "<\/strong><\/a></div>" +
		"<div>Posted by <a target='_blank' href='" + photo.owner_url + "'>" +
		photo.owner_name + "<\/a></div><\/div>" +
		"<\/div>";
	marker.html = html;
	GEvent.addListener(marker, "click", function() {
		me.panoLayer.map.openInfoWindow(marker.getLatLng(), marker.html, {noCloseOnClick: true});
	});
	return marker;
}
function PanoramioLayer(map, opt_opts) {
	var me = this;
	me.map = map;
	me.ids = {};
	me.mgr = new MarkerManager(map, {maxZoom: 19});
	var icon = new GIcon();
	icon.image = "http://www.panoramio.com/img/panoramio-marker.png";
	icon.shadow = "";
	icon.iconSize = new GSize(24, 24);
	icon.shadowSize = new GSize(22, 22);
	icon.iconAnchor = new GPoint(9, 9);
	icon.infoWindowAnchor = new GPoint(9, 0);
	me.markerIcon = icon;
	me.enabled = false;
	GEvent.addListener(map, "moveend", function() {
		if (me.enabled) {
			var bounds = map.getBounds();
			var southWest = bounds.getSouthWest();
			var northEast = bounds.getNorthEast();
			me.load(me, {maxy: northEast.lat(), miny: southWest.lat(), maxx: northEast.lng(), minx: southWest.lng()});
		}
	});
}
PanoramioLayer.prototype.enable = function() {
	this.enabled = true;
	GEvent.trigger(map, "moveend");
}
PanoramioLayer.prototype.disable = function() {
	this.enabled = false;
	this.mgr.clearMarkers();
	this.ids = {};
}
PanoramioLayer.prototype.getEnabled = function() {
	return this.enabled;
}
PanoramioLayer.prototype.load = function(panoLayer, userOptions) {
	var options = {
		order: "popularity",
		set: "public",
		from: "0",
		to: "10",
		minx: "-180",
		miny: "-90",
		maxx: "180",
		maxy: "90",
		size: "small"
	};
	for (optionName in userOptions) {
		if (userOptions.hasOwnProperty(optionName)) {
			options[optionName] = userOptions[optionName];
		}
	}
	var url = "http://www.panoramio.com/map/get_panoramas.php?";
	var uniqueID = "";
	for (optionName in options) {
		if (options.hasOwnProperty(optionName)) {
			var optionVal = "" + options[optionName] + "";
			url += optionName + "=" + optionVal + "&";
			uniqueID += optionVal.replace(/[^\w]+/g,"");
		}
	}
	var callbackName = "PanoramioLayerCallback.loader" + uniqueID; //ask dion
	eval(callbackName + " = function(json) { var pa = new PanoramioLayerCallback(json, panoLayer);}");
	var script = document.createElement('script');
	script.setAttribute('src', url + 'callback=' + callbackName);
	script.setAttribute('id', 'jsonScript');
	script.setAttribute('type', 'text/javascript');
	document.documentElement.firstChild.appendChild(script);
}