Google Maps overlay disappears at certain zoom level

Google Maps overlay disappears at certain zoom level - javascript

I am having a problem with a custom overlay icon marker in google maps.
It works fine at all zoom levels, but disappears at max zoom. In the demo only the lower icon disappears, but the upper one is ok.
Demo: http://random.hypervolume.com/map_bug.html
Try to zoom in on the lower marker, the one on 34-th street. At max zoom level it disappears.
Here is the source:
var map;
function init() {
var opts = { zoom: 14, mapTypeId: google.maps.MapTypeId.ROADMAP };
map = new google.maps.Map(document.getElementById('mapcanvas'), opts);
map.setCenter(new google.maps.LatLng(40.761231, -73.9839609));
new MyMarker(new google.maps.LatLng(40.761231, -73.9839609), map, "A");
new MyMarker(new google.maps.LatLng(40.75013, -73.987974), map, "B");
}
var ICON_WIDTH = 52;
var ICON_HEIGHT = 52;
var ICON_URL = "http://random.hypervolume.com/m1.png";
function MyMarker(position, map, id) {
this.id = id;
this.position = position;
this.map = map;
this.setMap(map);
}
MyMarker.prototype = new google.maps.OverlayView();
MyMarker.prototype.onAdd = function() {
var div = this.div = document.createElement('DIV');
div.id = this.id;
div.style.width = ICON_WIDTH;
div.style.height = ICON_HEIGHT;
div.style.position = 'absolute';
var image = new Image();
image.src = ICON_URL;
div.appendChild(image);
this.getPanes().overlayMouseTarget.appendChild(div);
};
MyMarker.prototype.draw = function() {
var pos = this.getProjection().fromLatLngToDivPixel(this.position);
pos.x -= ICON_WIDTH / 2;
pos.y -= ICON_HEIGHT / 2;
this.div.style.top = pos.y + 'px';
this.div.style.left = pos.x + 'px';
};

Ok, got it!
Just add the following style to your div:
-webkit-transform: translateZ(0px)
You can do this in JS:
div.style.webkitTransform = 'translateZ(0px)';
Origin issue: http://code.google.com/p/google-maps-utility-library-v3/issues/detail?id=176

Related

How to fill color inside tiles using tile co-ordinates Google Maps?

I have a tile overlay on google map.I would like to shade or fill color the tile(10,15) as red.I here by attached the image how the result should be. here is the link to my code .https://jsfiddle.net/60fhd57b/3/
function CoordMapType(tileSize) {
this.tileSize = tileSize;
}
CoordMapType.prototype.getTile = function(coord, zoom, ownerDocument) {
var div = ownerDocument.createElement('div');
div.innerHTML = coord;
div.style.width = this.tileSize.width + 'px';
div.style.height = this.tileSize.height + 'px';
div.style.fontSize = '10';
div.style.borderStyle = 'solid';
div.style.borderWidth = '1px';
div.style.borderColor = '#AAAAAA';
return div;
};
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 5,
center: {lat: 41.850, lng: -87.650}
});
map.overlayMapTypes.insertAt(
0, new CoordMapType(new google.maps.Size(200, 200)));
}

Heres a working example:
https://jsfiddle.net/60fhd57b/13/
You should replace the image with a something that looks like the example you listed.
It works by checking if the current cordinates are the ones you specified
if(coord.x == 10 && coord.y == 15){
div.style.backgroundImage = 'url("url to image")'
}

How to make overlay div in google map dragable?

I need to drag the position of the div. I used below code and but is not worked. I think i done some mistake over here.also i need to rotate the div so that i can place the image at right position
var overlay;
DebugOverlay.prototype = new google.maps.OverlayView();
function initialize() {
var mapOptions = {
zoom: 15,
center: new google.maps.LatLng(40.743388, -74.007592)
};
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var swBound = new google.maps.LatLng(40.73660837340877, -74.01852328);
var neBound = new google.maps.LatLng(40.75214181, -73.99661518216243);
var bounds = new google.maps.LatLngBounds(swBound, neBound);
var srcImage = 'http://library.marist.edu/pix/LibMap3.jpg';
overlay = new DebugOverlay(bounds, srcImage, map);
var markerA = new google.maps.Marker({
position: swBound,
map: map,
draggable: true
});
var markerB = new google.maps.Marker({
position: neBound,
map: map,
draggable: true
});
google.maps.event.addListener(markerA, 'drag', function () {
var newPointA = markerA.getPosition();
var newPointB = markerB.getPosition();
var newBounds = new google.maps.LatLngBounds(newPointA, newPointB);
overlay.updateBounds(newBounds);
});
google.maps.event.addListener(markerB, 'drag', function () {
var newPointA = markerA.getPosition();
var newPointB = markerB.getPosition();
var newBounds = new google.maps.LatLngBounds(newPointA, newPointB);
overlay.updateBounds(newBounds);
});
google.maps.event.addListener(markerA, 'dragend', function () {
var newPointA = markerA.getPosition();
var newPointB = markerB.getPosition();
console.log("point1" + newPointA);
console.log("point2" + newPointB);
});
google.maps.event.addListener(markerB, 'dragend', function () {
var newPointA = markerA.getPosition();
var newPointB = markerB.getPosition();
console.log("point1" + newPointA);
console.log("point2" + newPointB);
});
}
function DebugOverlay(bounds, image, map) {
this.bounds_ = bounds;
this.image_ = image;
this.map_ = map;
this.div_ = null;
this.setMap(map);
}
DebugOverlay.prototype.onAdd = function () {
var div = document.createElement('div');
div.style.borderStyle = 'none';
div.style.borderWidth = '0px';
div.style.position = 'absolute';
var img = document.createElement('img');
img.src = this.image_;
img.style.width = '100%';
img.style.height = '100%';
img.style.opacity = '0.5';
img.style.position = 'absolute';
div.appendChild(img);
this.div_ = div;
var panes = this.getPanes();
panes.overlayLayer.appendChild(div);
};
DebugOverlay.prototype.draw = function () {
debugger;
var overlayProjection = this.getProjection();
var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());
var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());
var div = this.div_;
div.style.left = sw.x + 'px';
div.style.top = ne.y + 'px';
div.style.width = (ne.x - sw.x) + 'px';
div.style.height = (sw.y - ne.y) + 'px';
};
DebugOverlay.prototype.updateBounds = function (bounds) {
this.bounds_ = bounds;
this.draw();
};
DebugOverlay.prototype.onRemove = function () {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
};
google.maps.event.addDomListener(window, 'load', initialize);

(I spent too many minutes than I expect at first...)
As far as I understand your question and your code, you want to drag the floor map image directly, and the corner markers are followed with it, correct?
HTML5 supports the drag events.
http://www.w3schools.com/html/html5_draganddrop.asp
However, in google maps v3, all mouse events are captured by Google Maps.
Here is the trick.
Capture the mouse event
In order to catch the mouse events, you need to insert a div (named mouseTarget in my code) into the overlayMouseTarget pane. The overlayMouseTarget is the most top layer in Google Maps v3.
But it sets .style.display=none in normal status (not dragging). It becomes .style.display=block only if you mouse down the mouseTarget div.
However, even if in normal status, the mouseTarget div have to catch up the position with the image.
Dragging events
When you mousedown on the mouseTarget, you have to cancel the event at once in order to prevent dragging the map.
Then, you need to handle dragstart, drag, and dragleave events by yourself.
It means you need to follow the mouse cursor position, then recalculate the image position, and marker positions.
Here is my answer for your first question I need to drag the position of the div.
https://jsfiddle.net/wf9a5m75/wj65aLrk/

Load GoogleMap Async with USGSOverlay

I'm currently working with Browserify for my JS Files. I got an error when i try to load GoogleMap Api aSync and apply USGSOverlay for custom image overlay.
I followed this https://developers.google.com/maps/documentation/javascript/examples/map-simple-async and https://developers.google.com/maps/documentation/javascript/customoverlays.
Everything work well for a simple GoogleMaps but as soon as i apply the USGSOverlay, i got multiple error like : Uncaught TypeError: this.draw is not a function WM15838:1
It must be how i call my function.. ? Here the code :
var $ = require('jquery');
var overlay;
var map;
var USGSOverlay;
//map_area is defined inline, but for this post...
var map_area = new Array('45.684994,-73.731739','45.684616,-73.732816','45.684450,-73.732558','45.684659,-73.732002','45.684832,-73.731602');
window.launchMap = function() {
initialize();
}
USGSOverlay.prototype.onAdd = function() {
var div = document.createElement('div');
div.style.borderStyle = 'none';
div.style.borderWidth = '0px';
div.style.position = 'absolute';
// Create the img element and attach it to the div.
var img = document.createElement('img');
img.src = this.image_;
img.style.width = '100%';
img.style.height = '100%';
img.style.position = 'absolute';
div.appendChild(img);
this.div_ = div;
// Add the element to the "overlayLayer" pane.
var panes = this.getPanes();
panes.overlayLayer.appendChild(div);
};
// The onRemove() method will be called automatically from the API if
// we ever set the overlay's map property to 'null'.
USGSOverlay.prototype.onRemove = function() {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
};
function USGSOverlay(bounds, image, map) {
// Initialize all properties.
this.bounds_ = bounds;
this.image_ = image;
this.map_ = map;
// Define a property to hold the image's div. We'll
// actually create this div upon receipt of the onAdd()
// method so we'll leave it null for now.
this.div_ = null;
// Explicitly call setMap on this overlay.
this.setMap(map);
}
USGSOverlay.prototype.draw = function() {
// We use the south-west and north-east
// coordinates of the overlay to peg it to the correct position and size.
// To do this, we need to retrieve the projection from the overlay.
var overlayProjection = this.getProjection();
// Retrieve the south-west and north-east coordinates of this overlay
// in LatLngs and convert them to pixel coordinates.
// We'll use these coordinates to resize the div.
var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());
var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());
// Resize the image's div to fit the indicated dimensions.
var div = this.div_;
div.style.left = sw.x + 'px';
div.style.top = ne.y + 'px';
div.style.width = (ne.x - sw.x) + 'px';
div.style.height = (sw.y - ne.y) + 'px';
};
function initialize() {
USGSOverlay.prototype = new google.maps.OverlayView();
var mapOptions = {
zoom: 16,
scrollwheel: false,
center: new google.maps.LatLng(45.684163, -73.733305),
mapTypeId: google.maps.MapTypeId.SATELLITE
};
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var marker_pin = "/images/site/Pin.png";
var swBound = new google.maps.LatLng(45.678510, -73.747798);
var neBound = new google.maps.LatLng(45.692415, -73.718118);
var bounds = new google.maps.LatLngBounds(swBound, neBound);
// The photograph is courtesy of the U.S. Geological Survey.
var srcImage = 'map.png';
// The custom USGSOverlay object contains the USGS image,
// the bounds of the image, and a reference to the map.
overlay = new USGSOverlay(bounds, srcImage, map);
infowindow = new google.maps.InfoWindow({
content: "Chargement..."
});
var areaCoords = [];
if (map_area.length > 0) {
for (i = 0; i < map_area.length; i++) {
areaCoords[i] = new Array();
for (j = 0; j < map_area[i].length; j++) {
coord = map_area[i][j].split(',');
areaCoords[i][j] = new google.maps.LatLng(coord[0], coord[1]);
}
polygonMap = new google.maps.Polygon({
paths: areaCoords[i],
strokeColor: '#ff2205',
strokeOpacity: 0.8,
strokeWeight: 3,
fillColor: '#ff2205',
fillOpacity: 0
});
polygonMap.setMap(map);
}
// Add a listener for the click event.
/*google.maps.event.addListener(polygonMap, 'click', function() {
}); */
}
$('.block_unit').each(function(index, element) {
var _lat = $(this).find('.address').data('lat');
var _lng = $(this).find('.address').data('lng');
latLng = new google.maps.LatLng(_lat, _lng)
$(this).next('.map_popup').find('.text').html($(this).find('.block__title').html());
var info = $(this).next('.map_popup').html();
//info.find('.text').html($(this).find('.block__title').html());
var marker = new google.maps.Marker({
map: map,
position: latLng,
icon: new google.maps.MarkerImage(marker_pin)
});
google.maps.event.addListener(marker, "click", function() {
if (infowindow) infowindow.close();
infowindow = new google.maps.InfoWindow({content: info});
infowindow.open(map, marker);
});
});
}
function loadScript() {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3.exp' +
'&signed_in=true&callback=launchMap';
document.body.appendChild(script);
}
window.onload = loadScript;

The USGSOverlay depends on the Google Maps Javascript API v3. You can't define it until after that code is loaded. Define it inside your launchMap or initialize functions.
proof of concept fiddle
code snippet:
var overlay;
var map;
var USGSOverlay;
//map_area is defined inline, but for this post...
var map_area = new Array('45.684994,-73.731739', '45.684616,-73.732816', '45.684450,-73.732558', '45.684659,-73.732002', '45.684832,-73.731602');
window.launchMap = function() {
/** #constructor */
USGSOverlay = function(bounds, image, map) {
// Initialize all properties.
this.bounds_ = bounds;
this.image_ = image;
this.map_ = map;
// Define a property to hold the image's div. We'll
// actually create this div upon receipt of the onAdd()
// method so we'll leave it null for now.
this.div_ = null;
// Explicitly call setMap on this overlay.
this.setMap(map);
};
USGSOverlay.prototype = new google.maps.OverlayView();
USGSOverlay.prototype.onAdd = function() {
var div = document.createElement('div');
div.style.borderStyle = 'none';
div.style.borderWidth = '0px';
div.style.position = 'absolute';
// Create the img element and attach it to the div.
var img = document.createElement('img');
img.src = this.image_;
img.style.width = '100%';
img.style.height = '100%';
img.style.position = 'absolute';
div.appendChild(img);
this.div_ = div;
// Add the element to the "overlayLayer" pane.
var panes = this.getPanes();
panes.overlayLayer.appendChild(div);
};
// The onRemove() method will be called automatically from the API if
// we ever set the overlay's map property to 'null'.
USGSOverlay.prototype.onRemove = function() {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
};
USGSOverlay.prototype.draw = function() {
// We use the south-west and north-east
// coordinates of the overlay to peg it to the correct position and size.
// To do this, we need to retrieve the projection from the overlay.
var overlayProjection = this.getProjection();
// Retrieve the south-west and north-east coordinates of this overlay
// in LatLngs and convert them to pixel coordinates.
// We'll use these coordinates to resize the div.
var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());
var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());
// Resize the image's div to fit the indicated dimensions.
var div = this.div_;
div.style.left = sw.x + 'px';
div.style.top = ne.y + 'px';
div.style.width = (ne.x - sw.x) + 'px';
div.style.height = (sw.y - ne.y) + 'px';
};
initialize();
};
function initialize() {
var mapOptions = {
zoom: 14,
scrollwheel: false,
center: new google.maps.LatLng(45.684163, -73.733305),
mapTypeId: google.maps.MapTypeId.SATELLITE
};
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var marker_pin = "/images/site/Pin.png";
var swBound = new google.maps.LatLng(45.678510, -73.747798);
var neBound = new google.maps.LatLng(45.692415, -73.718118);
var bounds = new google.maps.LatLngBounds(swBound, neBound);
// The photograph is courtesy of the U.S. Geological Survey.
// var srcImage = 'map.png';
var srcImage = 'https://developers.google.com/maps/documentation/javascript/';
srcImage += 'examples/full/images/talkeetna.png';
// The custom USGSOverlay object contains the USGS image,
// the bounds of the image, and a reference to the map.
overlay = new USGSOverlay(bounds, srcImage, map);
infowindow = new google.maps.InfoWindow({
content: "Chargement..."
});
var areaCoords = [];
if (map_area.length > 0) {
for (i = 0; i < map_area.length; i++) {
areaCoords[i] = [];
for (j = 0; j < map_area[i].length; j++) {
coord = map_area[i][j].split(',');
areaCoords[i][j] = new google.maps.LatLng(coord[0], coord[1]);
}
polygonMap = new google.maps.Polygon({
paths: areaCoords[i],
strokeColor: '#ff2205',
strokeOpacity: 0.8,
strokeWeight: 3,
fillColor: '#ff2205',
fillOpacity: 0
});
polygonMap.setMap(map);
}
// Add a listener for the click event.
/*google.maps.event.addListener(polygonMap, 'click', function() {
}); */
}
$('.block_unit').each(function(index, element) {
var _lat = $(this).find('.address').data('lat');
var _lng = $(this).find('.address').data('lng');
latLng = new google.maps.LatLng(_lat, _lng);
$(this).next('.map_popup').find('.text').html($(this).find('.block__title').html());
var info = $(this).next('.map_popup').html();
//info.find('.text').html($(this).find('.block__title').html());
var marker = new google.maps.Marker({
map: map,
position: latLng,
icon: new google.maps.MarkerImage(marker_pin)
});
google.maps.event.addListener(marker, "click", function() {
if (infowindow) infowindow.close();
infowindow = new google.maps.InfoWindow({
content: info
});
infowindow.open(map, marker);
});
});
}
function loadScript() {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3.exp' +
'&signed_in=true&callback=launchMap';
document.body.appendChild(script);
}
window.onload = loadScript;
html,
body,
#map-canvas {
height: 500px;
width: 500px;
margin: 0px;
padding: 0px
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="map-canvas" style="border: 2px solid #3872ac;"></div>
<div id="order_list"></div>
<div id="product-list-display"></div>

Customizing an InfoWindow

Is it possible to change the color of the border, the alignment, padding and other attributes of an InfoWindow? I've been looking for this for a week but I always end up here. And it does not provide a code.
Here's my code.
//Declare an infoWindow variable - shows when a marker is tapped/clicked
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("outputXML.php", function(data)
{
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("name");
var address = markers[i].getAttribute("address");
var type = markers[i].getAttribute("type");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var html = "<b>" + name + "</b> <br/>" + address;
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon,
title:name
});
bindInfoWindow(marker, map, infoWindow, html);
}
});
function bindInfoWindow(marker, map, infoWindow, html) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}//END FUNCTION BINDINFOWINDOW
function doNothing() {} //For request.onreadystatechange
By the way, I'm catching those values from an online database, we don't have to mind that, they're all working fine, the only problem is how to customize an infoWindow.
Please help me. Thanks.
ADD: I forgot to say that I will insert this into an android application. I'm using webview.

The content that you pass to an InfoWindow may be: text, HTML, or a DOM element. The InfoWindow is by default sized to fit whataver content you pass, so the best way to control the content the way you describe is to create a div, assign a CSS class to the div, and then you will have complete control over the appearance of your InfoWindow content.
Also, if you want to have more control over the actual appearance of the window structure itself, you may want to consider using the InfoBubble Utility Library as a stylable drop-in replacement for the standard InfoWindow.

Checkout the sample code of this url,
In this code, InfoBox extends GOverlay class from the Google Maps API and creating div dynamically and drawing into the map.
Another Example page
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Info Window Custom</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
/* An InfoBox is like an info window, but it displays
* under the marker, opens quicker, and has flexible styling.
* #param {GLatLng} latlng Point to place bar at
* #param {Map} map The map on which to display this InfoBox.
* #param {Object} opts Passes configuration options - content,
* offsetVertical, offsetHorizontal, className, height, width
*/
function InfoBox(opts) {
google.maps.OverlayView.call(this);
this.latlng_ = opts.latlng;
this.map_ = opts.map;
this.offsetVertical_ = -195;
this.offsetHorizontal_ = 0;
this.height_ = 165;
this.width_ = 266;
var me = this;
this.boundsChangedListener_ =
google.maps.event.addListener(this.map_, "bounds_changed", function() {
return me.panMap.apply(me);
});
// Once the properties of this OverlayView are initialized, set its map so
// that we can display it. This will trigger calls to panes_changed and
// draw.
this.setMap(this.map_);
}
/* InfoBox extends GOverlay class from the Google Maps API
*/
InfoBox.prototype = new google.maps.OverlayView();
/* Creates the DIV representing this InfoBox
*/
InfoBox.prototype.remove = function() {
if (this.div_) {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}
};
/* Redraw the Bar based on the current projection and zoom level
*/
InfoBox.prototype.draw = function() {
// Creates the element if it doesn't exist already.
this.createElement();
if (!this.div_) return;
// Calculate the DIV coordinates of two opposite corners of our bounds to
// get the size and position of our Bar
var pixPosition = this.getProjection().fromLatLngToDivPixel(this.latlng_);
if (!pixPosition) return;
// Now position our DIV based on the DIV coordinates of our bounds
this.div_.style.width = this.width_ + "px";
this.div_.style.left = (pixPosition.x + this.offsetHorizontal_) + "px";
this.div_.style.height = this.height_ + "px";
this.div_.style.top = (pixPosition.y + this.offsetVertical_) + "px";
this.div_.style.display = 'block';
};
/* Creates the DIV representing this InfoBox in the floatPane. If the panes
* object, retrieved by calling getPanes, is null, remove the element from the
* DOM. If the div exists, but its parent is not the floatPane, move the div
* to the new pane.
* Called from within draw. Alternatively, this can be called specifically on
* a panes_changed event.
*/
InfoBox.prototype.createElement = function() {
var panes = this.getPanes();
var div = this.div_;
if (!div) {
// This does not handle changing panes. You can set the map to be null and
// then reset the map to move the div.
div = this.div_ = document.createElement("div");
div.style.border = "0px none";
div.style.position = "absolute";
div.style.background = "url('http://gmaps-samples.googlecode.com/svn/trunk/images/blueinfowindow.gif')";
div.style.width = this.width_ + "px";
div.style.height = this.height_ + "px";
var contentDiv = document.createElement("div");
contentDiv.style.padding = "30px"
contentDiv.innerHTML = "<b>Hello World! </b>";
var topDiv = document.createElement("div");
topDiv.style.textAlign = "right";
var closeImg = document.createElement("img");
closeImg.style.width = "32px";
closeImg.style.height = "32px";
closeImg.style.cursor = "pointer";
closeImg.src = "http://gmaps-samples.googlecode.com/svn/trunk/images/closebigger.gif";
topDiv.appendChild(closeImg);
function removeInfoBox(ib) {
return function() {
ib.setMap(null);
};
}
google.maps.event.addDomListener(closeImg, 'click', removeInfoBox(this));
div.appendChild(topDiv);
div.appendChild(contentDiv);
div.style.display = 'none';
panes.floatPane.appendChild(div);
this.panMap();
} else if (div.parentNode != panes.floatPane) {
// The panes have changed. Move the div.
div.parentNode.removeChild(div);
panes.floatPane.appendChild(div);
} else {
// The panes have not changed, so no need to create or move the div.
}
}
/* Pan the map to fit the InfoBox.
*/
InfoBox.prototype.panMap = function() {
// if we go beyond map, pan map
var map = this.map_;
var bounds = map.getBounds();
if (!bounds) return;
// The position of the infowindow
var position = this.latlng_;
// The dimension of the infowindow
var iwWidth = this.width_;
var iwHeight = this.height_;
// The offset position of the infowindow
var iwOffsetX = this.offsetHorizontal_;
var iwOffsetY = this.offsetVertical_;
// Padding on the infowindow
var padX = 40;
var padY = 40;
// The degrees per pixel
var mapDiv = map.getDiv();
var mapWidth = mapDiv.offsetWidth;
var mapHeight = mapDiv.offsetHeight;
var boundsSpan = bounds.toSpan();
var longSpan = boundsSpan.lng();
var latSpan = boundsSpan.lat();
var degPixelX = longSpan / mapWidth;
var degPixelY = latSpan / mapHeight;
// The bounds of the map
var mapWestLng = bounds.getSouthWest().lng();
var mapEastLng = bounds.getNorthEast().lng();
var mapNorthLat = bounds.getNorthEast().lat();
var mapSouthLat = bounds.getSouthWest().lat();
// The bounds of the infowindow
var iwWestLng = position.lng() + (iwOffsetX - padX) * degPixelX;
var iwEastLng = position.lng() + (iwOffsetX + iwWidth + padX) * degPixelX;
var iwNorthLat = position.lat() - (iwOffsetY - padY) * degPixelY;
var iwSouthLat = position.lat() - (iwOffsetY + iwHeight + padY) * degPixelY;
// calculate center shift
var shiftLng =
(iwWestLng < mapWestLng ? mapWestLng - iwWestLng : 0) +
(iwEastLng > mapEastLng ? mapEastLng - iwEastLng : 0);
var shiftLat =
(iwNorthLat > mapNorthLat ? mapNorthLat - iwNorthLat : 0) +
(iwSouthLat < mapSouthLat ? mapSouthLat - iwSouthLat : 0);
// The center of the map
var center = map.getCenter();
// The new map center
var centerX = center.lng() - shiftLng;
var centerY = center.lat() - shiftLat;
// center the map to the new shifted center
map.setCenter(new google.maps.LatLng(centerY, centerX));
// Remove the listener after panning is complete.
google.maps.event.removeListener(this.boundsChangedListener_);
this.boundsChangedListener_ = null;
};
function initialize() {
var myOptions = {
zoom: 8,
center: new google.maps.LatLng(-33.397, 150.644),
mapTypeId: google.maps.MapTypeId.ROADMAP,
sensor: 'true'
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var marker = new google.maps.Marker({
position: new google.maps.LatLng(-34, 150),
map: map
});
google.maps.event.addListener(marker, "click", function(e) {
var infoBox = new InfoBox({latlng: marker.getPosition(), map: map});
});
google.maps.event.trigger(marker, "click");
}
</script>
</head>
<body style="margin:0px; padding:0px;" onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>

Smart Info Window and Google Maps Marker

I'm trying to implement the 'Smart Info Window' code by Pamela Fox into my Google map and I just can't seem to get this to work. The map appears with the markers correctly positioned on it. But when I click on the marker nothing happens, but I don't get any error messages and I must admit to being a bit lost with this.
Where am I going wrong?
HTML Form
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>All Locations</title>
<link rel="stylesheet" href="css/alllocationsstyle.css" type="text/css" media="all" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript" src="js/smartinfowindow.js"></script>
<script type="text/javascript">
var customIcons = {
0: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
1: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_green.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:6,
mapTypeId: 'roadmap'
});
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var locationname = markers[i].getAttribute("locationname");
var address = markers[i].getAttribute("address");
var totalfinds = markers[i].getAttribute("totalfinds");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("osgb36lat")),
parseFloat(markers[i].getAttribute("osgb36lon")));
var html = locationname + "<p>" + 'No. of finds: ' + "<b>" + totalfinds + "</b>" + "</p>";
var icon = {};
if (totalfinds == 0) {
icon = customIcons[0];
} else if (totalfinds >= 1) {
icon = customIcons[1];
}
var marker = new google.maps.Marker({
map: map,
position: point,
title: address,
icon: icon.icon,
shadow: icon.shadow
});
bounds.extend(point);
map.fitBounds(bounds);
google.maps.event.addListener(point, 'click', function(e) {
var infobox = new SmartInfoWindow({position: point, map: map, html: html});
});
}
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<div id="map"></div>
</body>
</html>
Smart Window JS
/* An SmartInfoWindow is like an info window, but it displays
* under the marker, opens quicker, and has flexible styling.
* #param {Object} opts Passes configuration options.
*/
function SmartInfoWindow(opts) {
google.maps.OverlayView.call(this);
this.latlng_ = opts.position;
this.content_ = opts.content;
this.map_ = opts.map;
this.height_ = 351;
this.width_ = 280;
this.size_ = new google.maps.Size(this.height_, this.width_);
this.offsetVertical_ = -this.height_;
this.offsetHorizontal_ = 0;
this.panned_ = false;
this.setMap(this.map_);
// We need to listen to bounds_changed event so that we can redraw
// absolute position every time the map moves.
// This is only needed because we append to body instead of map panes.
var me = this;
google.maps.event.addListener(this.map_, 'bounds_changed', function() {
me.draw();
});
}
/**
* SmartInfoWindow extends GOverlay class from the Google Maps API
*/
SmartInfoWindow.prototype = new google.maps.OverlayView();
/**
* Creates the DIV representing this SmartInfoWindow
*/
SmartInfoWindow.prototype.onRemove = function() {
if (this.div_) {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}
};
/**
* Called when the overlay is first added to the map.
*/
SmartInfoWindow.prototype.onAdd = function() {
// Creates the element if it doesn't exist already.
this.createElement();
};
/**
* Redraw based on the current projection and zoom level.
*/
SmartInfoWindow.prototype.draw = function() {
// Since we use bounds changed listener, projection is sometimes null
if (!this.getProjection()) {
return;
}
// This gives us the position in the tiles div.
var pixPosition = this.getProjection().fromLatLngToDivPixel(this.latlng_);
var centerPosition = this.getProjection().fromLatLngToDivPixel(this.map_.getCenter());
var centerPositionReal = new google.maps.Point(this.map_.getDiv().offsetWidth/2, this.map_.getDiv().offsetHeight/2);
// Figure out difference between map div and tiles div, so that we can
// calculate position in map div
var centerOffsetX = -centerPosition.x + centerPositionReal.x;
var centerOffsetY = -centerPosition.y + centerPositionReal.y;
if (!pixPosition) return;
var alignment = this.getBestAlignment();
var paddingTop = 0;
var paddingLeft = 0;
var widthLess = 0;
switch (alignment) {
case SmartInfoWindow.Align.ABOVE:
this.width_ = 280;
this.height_ = 351;
image = 'infobox_above.gif';
this.offsetX_ = -(this.width_ / 2 - 17);
this.offsetY_ = -(this.height_ + 12);
break;
case SmartInfoWindow.Align.BELOW:
this.width_ = 280;
this.height_ = 351;
image = 'infobox_below.gif';
this.offsetX_ = -(this.width_ / 2 - 17);
this.offsetY_ = -15;
paddingTop = 20;
break;
case SmartInfoWindow.Align.LEFT:
this.width_ = 307;
this.height_ = 326;
image = 'infobox_left.gif';
this.offsetX_ = -(this.width_) + 10;
this.offsetY_ = -(this.height_ / 2 + 33);
widthLess = 20;
break;
case SmartInfoWindow.Align.RIGHT:
image = 'infobox_right.gif';
this.width_ = 307;
this.height_ = 326;
this.offsetX_ = 6;
this.offsetY_ = -(this.height_ / 2 + 33);
paddingLeft = 20;
widthLess = 20;
break;
}
// Now position our DIV based on the DIV coordinates of our bounds
this.div_.style.width = this.width_ + 'px';
this.div_.style.left = (pixPosition.x + this.offsetX_) + centerOffsetX + 'px';
this.div_.style.height = this.height_ + 'px';
this.div_.style.top = (pixPosition.y + this.offsetY_) + centerOffsetY + 'px';
//this.div_.style.paddingTop = paddingTop + 'px';
//this.div_.style.paddingLeft = paddingLeft + 'px';
this.div_.style.background = 'url("images/' + image + '")';
this.div_.style.display = 'block';
this.wrapperDiv_.style.width = (this.width_- widthLess) + 'px';
this.wrapperDiv_.style.height = this.height_ + 'px';
this.wrapperDiv_.style.marginTop = paddingTop + 'px';
this.wrapperDiv_.style.marginLeft = paddingLeft + 'px';
this.wrapperDiv_.style.overflow = 'hidden';
if (!this.panned_) {
this.panned_ = true;
this.maybePanMap();
}
};
/**
* Creates the DIV representing this SmartInfoWindow in the floatPane. If the panes
* object, retrieved by calling getPanes, is null, remove the element from the
* DOM. If the div exists, but its parent is not the floatPane, move the div
* to the new pane.
* Called from within draw. Alternatively, this can be called specifically on
* a panes_changed event.
*/
SmartInfoWindow.prototype.createElement = function() {
var panes = this.getPanes();
var div = this.div_;
if (!div) {
// This does not handle changing panes. You can set the map to be null and
// then reset the map to move the div.
div = this.div_ = document.createElement('div');
div.style.border = '0px none';
div.style.position = 'absolute';
div.style.overflow = 'hidden';
var wrapperDiv = this.wrapperDiv_ = document.createElement('div');
var contentDiv = document.createElement('div');
if (typeof this.content_ == 'string') {
contentDiv.innerHTML = this.content_;
} else {
contentDiv.appendChild(this.content_);
}
var topDiv = document.createElement('div');
topDiv.style.textAlign = 'right';
var closeImg = document.createElement('img');
closeImg.src = 'images/closebigger.gif';
closeImg.style.width = '32px';
closeImg.style.height = '32px';
closeImg.style.cursor = 'pointer';
topDiv.appendChild(closeImg);
function removeSmartInfoWindow(ib) {
return function() {
ib.setMap(null);
};
}
google.maps.event.addDomListener(closeImg, 'click', removeSmartInfoWindow(this));
wrapperDiv.appendChild(topDiv);
wrapperDiv.appendChild(contentDiv);
div.appendChild(wrapperDiv);
div.style.display = 'none';
// Append to body, to avoid bug with Webkit browsers
// attempting CSS transforms on IFRAME or SWF objects
// and rendering badly.
document.body.appendChild(div);
} else if (div.parentNode != panes.floatPane) {
// The panes have changed. Move the div.
div.parentNode.removeChild(div);
panes.floatPane.appendChild(div);
} else {
// The panes have not changed, so no need to create or move the div.
}
};
SmartInfoWindow.mouseFilter = function(e) {
e.returnValue = 'true';
e['handled'] = true;
}
/**
* Closes infowindow
*/
SmartInfoWindow.prototype.close = function() {
this.setMap(null);
};
/**
* Pan the map to fit the SmartInfoWindow,
* if its top or bottom corners aren't visible.
*/
SmartInfoWindow.prototype.maybePanMap = function() {
// if we go beyond map, pan map
var map = this.map_;
var projection = this.getProjection();
var bounds = map.getBounds();
if (!bounds) return;
// The dimension of the infowindow
var iwWidth = this.width_;
var iwHeight = this.height_;
// The offset position of the infowindow
var iwOffsetX = this.offsetX_;
var iwOffsetY = this.offsetY_;
var anchorPixel = projection.fromLatLngToDivPixel(this.latlng_);
var bl = new google.maps.Point(anchorPixel.x + iwOffsetX + 20,
anchorPixel.y + iwOffsetY + iwHeight);
var tr = new google.maps.Point(anchorPixel.x + iwOffsetX + iwWidth,
anchorPixel.y + iwOffsetY);
var sw = projection.fromDivPixelToLatLng(bl);
var ne = projection.fromDivPixelToLatLng(tr);
// The bounds of the infowindow
if (!map.getBounds().contains(ne) || !map.getBounds().contains(sw)) {
map.panToBounds(new google.maps.LatLngBounds(sw, ne));
}
};
/**
* #enum {number}
*/
SmartInfoWindow.Align = {
ABOVE: 0,
LEFT: 1,
RIGHT: 2,
BELOW: 3
};
/**
* Finds best alignment for infowindow.
* #return {number} Alignment.
*/
SmartInfoWindow.prototype.getBestAlignment = function() {
var bestAlignment = SmartInfoWindow.Align.LEFT;
var minPan = 0;
for (var alignment in SmartInfoWindow.Align) {
var alignment = SmartInfoWindow.Align[alignment];
var panValue = this.getPanValue(alignment);
if (panValue > minPan) {
minPan = panValue;
bestAlignment = alignment;
}
}
return bestAlignment;
};
/**
* Calculates distance of corner for each alignment.
* #param {number} alignment An alignment constant.
* #return {number} Distance for that alignment.
*/
SmartInfoWindow.prototype.getPanValue = function(alignment) {
var mapSize = new google.maps.Size(this.map_.getDiv().offsetWidth,
this.map_.getDiv().offsetHeight);
var bounds = this.map_.getBounds();
var sideLatLng;
switch (alignment) {
case SmartInfoWindow.Align.ABOVE:
sideLatLng = new google.maps.LatLng(bounds.getNorthEast().lat(),
this.latlng_.lng());
break;
case SmartInfoWindow.Align.BELOW:
sideLatLng = new google.maps.LatLng(bounds.getSouthWest().lat(),
this.latlng_.lng());
break;
case SmartInfoWindow.Align.RIGHT:
sideLatLng = new google.maps.LatLng(this.latlng_.lat(),
bounds.getNorthEast().lng());
break;
case SmartInfoWindow.Align.LEFT:
sideLatLng = new google.maps.LatLng(this.latlng_.lat(),
bounds.getSouthWest().lng());
break;
}
var dist = SmartInfoWindow.distHaversine(this.latlng_.lat(), this.latlng_.lng(),
sideLatLng.lat(), sideLatLng.lng());
return dist;
};
/**
* Converts degrees to radians.
* #param {number} num Angle in degrees.
* #return {number} Angle in radians.
*/
SmartInfoWindow.toRad = function(num) {
return num * Math.PI / 180;
}
/**
* Calculates distance between two coordinates.
* #param {number} lat1 Latitude of first coord.
* #param {number} lon1 Longitude of second coord.
* #param {number} lat2 Latitude of second coord.
* #param {number} lon2 Longitude of second coord.
* #return {number} The distance.
*/
SmartInfoWindow.distHaversine = function(lat1, lon1, lat2, lon2) {
var R = 6371; // earth's mean radius in km
var dLat = SmartInfoWindow.toRad(lat2 - lat1);
var dLon = SmartInfoWindow.toRad(lon2 - lon1);
lat1 = SmartInfoWindow.toRad(lat1), lat2 = SmartInfoWindow.toRad(lat2);
var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) +
Math.cos(lat1) * Math.cos(lat2) *
Math.sin(dLon / 2) * Math.sin(dLon / 2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
var d = R * c;
return d;
}
UPDATED CODE
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Locations</title>
<link rel="stylesheet" href="css/alllocationsstyle.css" type="text/css" media="all" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript">
function InfoBox(opts) {
google.maps.OverlayView.call(this);
this.latlng_ = opts.latlng;
this.map_ = opts.map;
this.offsetVertical_ = -195;
this.offsetHorizontal_ = 0;
this.height_ = 165;
this.width_ = 266;
var me = this;
this.boundsChangedListener_ =
google.maps.event.addListener(this.map_, "bounds_changed", function() {
return me.panMap.apply(me);
});
// Once the properties of this OverlayView are initialized, set its map so
// that we can display it. This will trigger calls to panes_changed and
// draw.
this.setMap(this.map_);
}
/* InfoBox extends GOverlay class from the Google Maps API
*/
InfoBox.prototype = new google.maps.OverlayView();
/* Creates the DIV representing this InfoBox
*/
InfoBox.prototype.remove = function() {
if (this.div_) {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}
};
/* Redraw the Bar based on the current projection and zoom level
*/
InfoBox.prototype.draw = function() {
// Creates the element if it doesn't exist already.
this.createElement();
if (!this.div_) return;
// Calculate the DIV coordinates of two opposite corners of our bounds to
// get the size and position of our Bar
var pixPosition = this.getProjection().fromLatLngToDivPixel(this.latlng_);
if (!pixPosition) return;
// Now position our DIV based on the DIV coordinates of our bounds
this.div_.style.width = this.width_ + "px";
this.div_.style.left = (pixPosition.x + this.offsetHorizontal_) + "px";
this.div_.style.height = this.height_ + "px";
this.div_.style.top = (pixPosition.y + this.offsetVertical_) + "px";
this.div_.style.display = 'block';
};
/* Creates the DIV representing this InfoBox in the floatPane. If the panes
* object, retrieved by calling getPanes, is null, remove the element from the
* DOM. If the div exists, but its parent is not the floatPane, move the div
* to the new pane.
* Called from within draw. Alternatively, this can be called specifically on
* a panes_changed event.
*/
InfoBox.prototype.createElement = function() {
var panes = this.getPanes();
var div = this.div_;
if (!div) {
// This does not handle changing panes. You can set the map to be null and
// then reset the map to move the div.
div = this.div_ = document.createElement("div");
div.style.border = "0px none";
div.style.position = "absolute";
div.style.background = "url('http://gmaps-samples.googlecode.com/svn/trunk/images/blueinfowindow.gif')";
div.style.width = this.width_ + "px";
div.style.height = this.height_ + "px";
var contentDiv = document.createElement("div");
contentDiv.style.padding = "30px"
contentDiv.innerHTML = "<b>Hello World!</b>";
var topDiv = document.createElement("div");
topDiv.style.textAlign = "right";
var closeImg = document.createElement("img");
closeImg.style.width = "32px";
closeImg.style.height = "32px";
closeImg.style.cursor = "pointer";
closeImg.src = "http://gmaps-samples.googlecode.com/svn/trunk/images/closebigger.gif";
topDiv.appendChild(closeImg);
function removeInfoBox(ib) {
return function() {
ib.setMap(null);
};
}
google.maps.event.addDomListener(closeImg, 'click', removeInfoBox(this));
div.appendChild(topDiv);
div.appendChild(contentDiv);
div.style.display = 'none';
panes.floatPane.appendChild(div);
this.panMap();
} else if (div.parentNode != panes.floatPane) {
// The panes have changed. Move the div.
div.parentNode.removeChild(div);
panes.floatPane.appendChild(div);
} else {
// The panes have not changed, so no need to create or move the div.
}
}
/* Pan the map to fit the InfoBox.
*/
InfoBox.prototype.panMap = function() {
// if we go beyond map, pan map
var map = this.map_;
var bounds = map.getBounds();
if (!bounds) return;
// The position of the infowindow
var position = this.latlng_;
// The dimension of the infowindow
var iwWidth = this.width_;
var iwHeight = this.height_;
// The offset position of the infowindow
var iwOffsetX = this.offsetHorizontal_;
var iwOffsetY = this.offsetVertical_;
// Padding on the infowindow
var padX = 40;
var padY = 40;
// The degrees per pixel
var mapDiv = map.getDiv();
var mapWidth = mapDiv.offsetWidth;
var mapHeight = mapDiv.offsetHeight;
var boundsSpan = bounds.toSpan();
var longSpan = boundsSpan.lng();
var latSpan = boundsSpan.lat();
var degPixelX = longSpan / mapWidth;
var degPixelY = latSpan / mapHeight;
// The bounds of the map
var mapWestLng = bounds.getSouthWest().lng();
var mapEastLng = bounds.getNorthEast().lng();
var mapNorthLat = bounds.getNorthEast().lat();
var mapSouthLat = bounds.getSouthWest().lat();
// The bounds of the infowindow
var iwWestLng = position.lng() + (iwOffsetX - padX) * degPixelX;
var iwEastLng = position.lng() + (iwOffsetX + iwWidth + padX) * degPixelX;
var iwNorthLat = position.lat() - (iwOffsetY - padY) * degPixelY;
var iwSouthLat = position.lat() - (iwOffsetY + iwHeight + padY) * degPixelY;
// calculate center shift
var shiftLng =
(iwWestLng < mapWestLng ? mapWestLng - iwWestLng : 0) +
(iwEastLng > mapEastLng ? mapEastLng - iwEastLng : 0);
var shiftLat =
(iwNorthLat > mapNorthLat ? mapNorthLat - iwNorthLat : 0) +
(iwSouthLat < mapSouthLat ? mapSouthLat - iwSouthLat : 0);
// The center of the map
var center = map.getCenter();
// The new map center
var centerX = center.lng() - shiftLng;
var centerY = center.lat() - shiftLat;
// center the map to the new shifted center
map.setCenter(new google.maps.LatLng(centerY, centerX));
// Remove the listener after panning is complete.
google.maps.event.removeListener(this.boundsChangedListener_);
this.boundsChangedListener_ = null;
};
</script>
<script type="text/javascript">
var customIcons = {
0: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
1: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_green.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:6,
mapTypeId: 'roadmap'
});
// Change this depending on the name of your PHP file
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var locationname = markers[i].getAttribute("locationname");
var address = markers[i].getAttribute("address");
var totalfinds = markers[i].getAttribute("totalfinds");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("osgb36lat")),
parseFloat(markers[i].getAttribute("osgb36lon")));
var html = locationname + "<p>" + 'No. of finds: ' + "<b>" + totalfinds + "</b>" + "</p>";
var icon = {};
if (totalfinds == 0) {
icon = customIcons[0];
} else if (totalfinds >= 1) {
icon = customIcons[1];
}
var marker = new google.maps.Marker({
map: map,
position: point,
title: address,
icon: icon.icon,
shadow: icon.shadow
});
google.maps.event.addListener(marker, "click", function(e) {
var infoBox = new InfoBox({latlng: marker.getPosition(), map: map});
});
bounds.extend(point);
map.fitBounds(bounds);
}
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<div id="map"></div>
</body>
</html>

If I am reading your code correctly you assign listener to point (google.maps.LatLng), while you should do it for a marker. In fragment:
google.maps.event.addListener(point, 'click', function(e) {
var infobox = new SmartInfoWindow({position: point, map: map, html: html});
});
change point to marker:
google.maps.event.addListener(marker, 'click', function(e) {
var infobox = new SmartInfoWindow({position: point, map: map, html: html});
});

Develop Reference

JavaScript is the programming language of the Web.

Google Maps overlay disappears at certain zoom level - javascript

Ok, got it! Just add the following style to your div: -webkit-transform: translateZ(0px) You can do this in JS: div.style.webkitTransform = 'translateZ(0px)'; Origin issue: http://code.google.com/p/google-maps-utility-library-v3/issues/detail?id=176

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