function MapLocation(lat, lng, badge_html, link) {

	this.lat = lat;

	this.lng = lng;

	this.badge_html = badge_html;

	this.link = link;

	this.tag = lat + "," + lng;

}



// display a full page map.

function wp_geo_big_map(locations, combinedText, backLink, polyLines) {



	var el = document.getElementById("travel_map");

	

	if (!window.GBrowserIsCompatible) {

		alert("Can't display big map because Google Maps is not available. Is the WP Geo plugin installed?");

		return;

	}



	if ( GBrowserIsCompatible() ) {

	

		

		// remove rest of page contents

		el.parentNode.removeChild(el);

		while (document.body.children.length > 0) {

			document.body.removeChild(document.body.children[0]);

		}

		document.body.appendChild(el);

		

		// set full screen viewport

		document.body.style.height = "100%";

		document.body.style.overflow = "hidden";

		document.body.parentNode.style.height = "100%";

		document.body.parentNode.style.overflow = "hidden";

		

		jQuery("body").append(backLink);

		

		jQuery("body").append('<div id="big-map-tooltip"></div>');

		window.bigMapTooltip = jQuery("#big-map-tooltip");

		jQuery("body").mousemove(function(e) {

			positionBigMapTooltip(e.pageX, e.pageY);

		});

		

		var tagCounts = {}; // map of "lat,long" to 

		for (var i=0; i<locations.length; i++) {

			var location = locations[i];

			if (!tagCounts[location.tag]) {

				tagCounts[location.tag] = 1;

			} else {

				tagCounts[location.tag] ++;

			}

		}

	

		// draw markers

		var bounds = new GLatLngBounds();

		map = new GMap2(el, {mapTypes: [G_PHYSICAL_MAP, G_HYBRID_MAP]});

		var ui = map.getDefaultUI();

		map.setUI(ui);

		map.addControl(new GLargeMapControl());

		var points = [];

		var drawnTags = {};

		for (var i=0; i<locations.length; i++) {

			var location = locations[i];

			var center = new GLatLng(location.lat, location.lng);

			if (location.tag && tagCounts[location.tag] > 1) {

				if (drawnTags[location.tag]) {

					continue;

				}

				drawnTags[location.tag] = true;

				var count = 0;

				for (var j=0; j<locations.length; j++) {

					if (locations[j].tag == location.tag) {

						count ++;

					}

				}

				var badgeHtml = '<div class="big-map-tooltip">' + count + " " + combinedText + "</div>";

				var marker = createBigMapMarker(map, center, G_DEFAULT_ICON, badgeHtml);

				addTagListPopup(marker, location.tag);

			} else {

				//var icon = i == 0 ? G_DEFAULT_ICON : wpgeo_icon_small

				var marker = createBigMapMarker(map, center, G_DEFAULT_ICON, location.badge_html);

				GEvent.addListener(marker, "click", makeIframePopupCallback(marker, location.link));

			}

			points[points.length] = center;

			bounds.extend(center);

		}

		if (polyLines) {

			var polyline = new GPolyline(points, "#FFFFFF", 3, 0.7);

			map.addOverlay(polyline);

		}

		zoom = map.getBoundsZoomLevel(bounds);

		map.setCenter(bounds.getCenter(), zoom);

	}

	

	function addTagListPopup(marker, tag) {

		GEvent.addListener(marker, "click", function(overlay, latlong) {

			var badgeHtml = [];

			for (var i=0; i<locations.length; i++) {

				var location = locations[i];

				var pointTag = location.tag;

				if (pointTag == tag) {

					badgeHtml.push(location.badge_html);

				}

			}

			var el = document.createElement("div");

			el.innerHTML = badgeHtml.join("");

			var links = el.getElementsByTagName("a");

			for (var i=0; i<links.length; i++) {

				var originalHref = links[i].href;

				links[i].href = "javascript:void(0);";

				links[i].onclick = makeIframePopupCallback(marker, originalHref);

			}

			marker.openInfoWindow(el, {maxWidth: 1100});

		});

	}

	

	function makeIframePopupCallback(marker, link) {

		return function(overlay, latlong) {

			var el = document.createElement("div");

			el.innerHTML = "loading...";

			el.style.width = "660px";

			el.style.height = "550px";

			el.style.border = "none";

			marker.openInfoWindow(el, {maxWidth: 1100});

			var f = function() {

				var qm_or_amp = link.indexOf("?") == -1 ? "?" : "&";

				el.innerHTML = '<iframe src="' + link + qm_or_amp + 'postonly=true" width="660" height="550" frameborder="0"></iframe>';

			};

			var ver = getInternetExplorerVersion();

			if (ver >= 6 && ver < 8) {

				// IE don't like immediately creating an iframe. Durr.

				setTimeout(f, 2000);

			} else {

				f();

			}

		}

	}

	

	function getInternetExplorerVersion() {

	   var rv = -1;

	   if (navigator.appName == 'Microsoft Internet Explorer')

	   {

		  var ua = navigator.userAgent;

		  var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");

		  if (re.exec(ua) != null)

			 rv = parseFloat( RegExp.$1 );

	   }

	   return rv;

	}

}





function createBigMapMarker(map, latlng, icon, badge, link)  {

	var tooltip = new Tooltip(marker, badge);

	var marker = new GMarker(latlng, icon);

	

	marker.latlng = latlng;

	marker.tooltip = tooltip;

	marker.badge = badge;

	marker.link = link;

	

	GEvent.addListener(marker, "mouseover", showBigMapTooltip);

	GEvent.addListener(marker, "mouseout", hideBigMapTooltip);

	

	map.addOverlay(marker);

	

	return marker;

	

}



function showBigMapTooltip(e) {

	if(!(this.isInfoWindowOpen || this.isHidden())) {	

		positionBigMapTooltip(e.pageX, e.pageY);

		bigMapTooltip.html(this.badge).show();

	}

}



function hideBigMapTooltip() {

	bigMapTooltip.hide();

}



function positionBigMapTooltip(x, y) {

	var width = bigMapTooltip.width();

	var left = x - Math.round(width * (1/3));

	var top = y - bigMapTooltip.height() - 15;

	if (left < 5) {

		left = 5;

	}

	var bodyWidth = jQuery("body").width();

	if (left + width + 5 > bodyWidth) {

		left = bodyWidth - width - 5;

	}

	if (top < 5) {

		top = y + 25;

	}

	bigMapTooltip.css("left", left);

	bigMapTooltip.css("top", top);

}