Google map doesn't show markers

Google map doesn't show markers - javascript

I'm sure this is something so basic, but I've been looking at it for an hour, and I can't see it. I'd appreciate a fresh pair of eyes. This is a pretty basic Google Maps API v3 project, copied almost verbatim from the cookbook, which loads data from a MySQL database into an XML file, and then loads data from the XML file into the map.
Here's 3 sample markers from the XML file:
<markers>
<marker name="Total Beverage" type="2" address="9359 Sheridan Blvd Wesminster, CO 80031" lat="-105.053293" lon="39.8658159"/>
<marker name="Union Jack Liquor" type="2" address="1160 S Boulder Road Louisville, CO 80027" lat="-105.1301647" lon="39.9868051"/>
<marker name="Argonaut Wine and Liquor" type="2" address="760 E Colfax Denver, CO 80203" lat="-104.9785574" lon="39.7398985"/>
</markers>
And here's the code that generates the map.
<!DOCTYPE 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>Big Choice Sample Map</title>
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map { height: 100% }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var customIcons = {
0: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_yellow.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
1: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
2: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
function load() {
var latlng = new google.maps.LatLng(39.909939, -105.078369);
var options = {
zoom: 12,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map"), options);
var infoWindow = new google.maps.InfoWindow;
downloadUrl("phpsql_genxml.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 type = parseInt(markers[i].getAttribute("type"));
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lon")));
var html = "<b>" + name + "</b>";
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
title: name,
icon: icon.icon,
shadow: icon.shadow
});
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);
}
function doNothing() {}
//]]>
</script>
</head>
<body style="margin:0px; padding:0px;" onload="load()">
<div id="map" style="width:100%; height:100%"></div>
</body>
</html>
The map centers at the right spot, and zooms to the right level, but the markers don't show up. Thanks for any pointers.

You have the latitude and longitude backwards in your xml:
lat="-105.053293" lon="39.8658159"
Your map is centered at :
var latlng = new google.maps.LatLng(39.909939, -105.078369);

Related

Google Maps load from DB with GeoLocation

So I have some working code which fetches results from my DB and displays them on a Google map. I also have some code which uses my location to place a marker on a Google map.
My issue is that when I add them together the page loads the results from the DB then I accept geoloaction and it centers the map to my location but doesn't display my marker and also removes the markers for the DB results.
Here is the DB result code:
<!DOCTYPE html >
<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>PHP/MySQL & Google Maps Example</title>
<script src="https://maps.googleapis.com/maps/api/js?key=API_KEY"
type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(47.6145, -122.3418),
zoom: 13,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("/Models/phpsqlajax_genxml2.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
});
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);
}
function doNothing() {}
//]]>
</script>
</head>
<body onload="load()">
<div id="map" style="width: 500px; height: 300px"></div>
</body>
</html>
This is my geolocation code:
// Check if user support geo-location
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
var geolocpoint = new google.maps.LatLng(latitude, longitude);
var map = new google.maps.Map(document.getElementById('nearMeMap'), {
zoom: 11,
scaleControl: false,
scrollwheel: false,
center: geolocpoint,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
// Place a marker
var geolocation = new google.maps.Marker({
position: geolocpoint,
map: map,
title: 'Your Location',
icon: 'https://mt.google.com/vt/icon?psize=20&font=fonts/Roboto-Regular.ttf&color=ff330000&name=icons/spotlight/spotlight-waypoint-blue.png&ax=44&ay=48&scale=1&text=%E2%80%A2'
});
});
}
Also I get this in the console:
ReferenceError: locations is not defined
for (i = 0; i < locations.length; i++) {

As the ReferenceError already says, you do not have the variable locations defined in your geolocation code.

Creating markers from external xml file

I am a newbie in Google Maps API.
I have a XML file that contains the following:
<?xml version="1.0"?>
-<Customers>-
<Marker category="Production">
<title lang="en">Invensys</title>
<site_location>Neponset Avenue 22, Foxborough, Foxboro, MA, United States</site_location>
<cordinantes>42.066817,-71.24814</cordinantes>
<site_status>Normal</site_status>
</Marker>
<Marker category="Production"><title lang="en">Yokogawa Japan</title>
<site_location>Shinjuku, Tokyo,Japan</site_location>
<cordinantes>36.543915,136.629281</cordinantes>
<site_status>Critical</site_status>
</Marker>
</Customers>
And this is the JS file containing the function that reads the XML file and enters the data into an array, file is called func.js.
<script src="jquery.xml2json.js" type="text/javascript" language="javascript"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
var markers = [];
$.get('Customers.xml', function(xml) {
var jsonObj = $.xml2json(xml);
$.each(jsonObj.Marker, function(){
var stat = this.site_status == "Critical" ? "redgoogle.png" : "green_marker.png";
var latlng = new google.maps.LatLng (this.cordinantes);
var mark = {
title: this.title,
location: this.site_location,
cord: latlng,
icon: stat
}
markers.push(mark);
});
debugger;
});
And this HTML file that contains the map & should generate two markers according to the content of the "markers" array.
<!DOCTYPE html>
<html>
<head>
<title>Simple Map</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
</style>
<script src="jquery.xml2json.js" type="text/javascript" language="javascript"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script type='text/javascript' src='func.js'></script>
<script>
markers;
var map;
function initialize() {
var mapOptions = {
zoom: 3,
center: new google.maps.LatLng(32.637929,-16.934395),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>
I need assistance in using the data inside the "markers" array in order to generate markets.
How can I use the markers array in order to do that ?
Thanks in advance.

In the Initialize function do this (if your sure the markers have been loaded at this point):
for(var i=0; i< markers.length; i++){
var marker = new google.maps.Marker({ position: markers[i].cord, map:map });
}
If the markers have not been loaded create a function like this:
function AddMarkers(){
for(var i=0; i< markers.length; i++){
var marker = new google.maps.Marker({ position: markers[i].cord, map:map });
}
}
And call this function in the callback of your $.get like this:
$.get('Customers.xml', function(xml) {
var jsonObj = $.xml2json(xml);
$.each(jsonObj.Marker, function(){
var stat = this.site_status == "Critical" ? "redgoogle.png" : "green_marker.png";
var latlng = new google.maps.LatLng (this.cordinantes);
var mark = {
title: this.title,
location: this.site_location,
cord: latlng,
icon: stat
}
markers.push(mark);
});
AddMarkers();
debugger;
});
That will add your markers, for information on how to generate a custom icon refers to
GoogleMaps API Reference
GoogleMaps Icon
You can complete the function AddMarkers to generate the icons and so on

XML File: Cities.xml
<Cities>
<CityName>
<id>1</id>
<name>A</name>
<latitude>40.978989</latitude>
<longitude>-81.488095</longitude>
</CityName>
<CityName>
<id>2</id>
<name>B</name>
<latitude>35.05956</latitude>
<longitude>-106.80981</longitude>
</CityName>
</Cities>
HTML:
<div id="map_canvas" style="width:460px;margin-left: 0px; padding: 0px; height:350px; text-align:center;"></div>
Add below script in head section.
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
Javascript:
window.onload = function () {
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
}
else {// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET", "Cities.xml", false);
xmlhttp.send();
xmlDoc = xmlhttp.responseXML;
var x = xmlDoc.getElementsByTagName("CityName");
var mapOptions = {
center: new google.maps.LatLng(39.8634242, -97.28818149999998),
zoom: 3,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
for (i = 0; i < x.length; i++) {
var latitudetest = x[i].getElementsByTagName("latitude")[0].childNodes[0].nodeValue;
var longitudetest = x[i].getElementsByTagName("longitude")[0].childNodes[0].nodeValue;
var data = '<div style="min-width:175px;text-align:left; min-height:80px;color:#000000;font-family:arial,sans-serif;font-style:normal; font-size:13px;">' + '<span style="font-weight:bold;font-size:13px;color:#000000;font-family:arial,sans-serif;font-style:normal; ">'+ x[i].getElementsByTagName("name")[0].childNodes[0].nodeValue + '</span>' + '</div>';
var myLatlng = new google.maps.LatLng(latitudetest, longitudetest);
var bluePin = new google.maps.MarkerImage('http://maps.google.com/mapfiles/ms/micons/blue-dot.png',
new google.maps.Size(32, 32),
new google.maps.Point(0, 0),
new google.maps.Point(14, 35));
var pinShadow = new google.maps.MarkerImage('http://maps.google.com/mapfiles/ms/micons/msmarker.shadow.png',
new google.maps.Size(59, 32),
new google.maps.Point(0, 0),
new google.maps.Point(14, 35));
var marker = new google.maps.Marker({
position: myLatlng,
icon: bluePin,
shadow: pinShadow,
map: map,
title: x[i].getElementsByTagName("name")[0].childNodes[0].nodeValue
});
(function (marker, data) {
google.maps.event.addListener(marker, 'click', function (e) {
infoWindow.setContent(data);
infoWindow.open(map, marker);
});
})(marker, data);
}
}
</script>

Google Maps v3 markerclusterer InfoWindow data

I have a database driven google map v3 which uses markerclusterer, everything is working fine, but I would like to show additional data, instead of just being able to show one direct result from the database (like the id or name etc). I had it working before using markerclusterer to the level of having a hyperlink, and would like to achieve a similar result.
The code I currently have is
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head profile="http://gmpg.org/xfn/11">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="JS/markerclusterer.js" type="text/javascript"></script>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js? sensor=false"></script>
</head>
<body onload="load()" onunload="GUnload()">
<div id="body">
<script type="text/javascript">
//<![CDATA[
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
function load() {
var cluster = [];
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(53.4788, -3.9551),
zoom: 6,
mapTypeId: 'roadmap'
});
var infowindow = new google.maps.InfoWindow();
var min = .999999;
var max = 1.000001;
// Change this depending on the name of your PHP file
downloadUrl("gmapxml.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("id");
var type = markers[i].getAttribute("town");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("longitude")));
var html = "<a href = 'profile.php?id="+address+"'>Visit "+ name +" </a></br><b>"+type;
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon,
shadow: icon.shadow
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(markers[i].getAttribute("id"));
infowindow.open(map, marker);
}
})(marker, i));
cluster.push(marker);
}
var mc = new MarkerClusterer(map,cluster);
});
}
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);
}
function doNothing() {}
//]]>
</script>
<div id="map" style="width: 800px; height: 600px"></div>
</div>
</div>
</body></html>
Any help would be really appreciated.

auto zoom/center google maps api?

I am pretty experienced when it come to php mysql, but javascript has got me scratching my head. I am trying to add google maps to my website to show where picture in my database were taken. I got the static google map to work, but it will only display 37 markers due to the url character limitations. I followed the tutorial at google maps api docs, and i have a map that will display all the coordinates for the images in my database. My problem is that i cannot for the life of me figure out how to get the map to auto center and auto zoom to fit all of my markers. my test website for my map is at maptest. I found this tutorial on how to auto center/zoom my map by no matter where i put his code i get errors. this is the code i have for my map that does not auto zoom/center:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Maps AJAX + mySQL/PHP Example</title>
<script src="http://maps.google.com/maps/api/js? key=AIzaSyDnMkDkoCHNE7BG4eobjeMJdWWZtdZvzeg&sensor=false"
type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.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(42.293564,-39.07617),
zoom: 2,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("phpsqlajax_genxml3.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/>";
//var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
//icon: icon.icon,
//shadow: icon.shadow
});
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);
}
function doNothing() {}
//]]>
</script>
</head>
<body onload="load()">
<div id="map" style="width: 600px; height: 400px"></div>
</body>
</html>

Tried this?
var fitToMarkers = function(markers) {
var bounds = new google.maps.LatLngBounds();
var length = markers.length;
for (var i = 0; i < length; i++) {
bounds.extend(new google.maps.LatLng(markers[i].lat, markers[i].lng));
map.fitBounds(bounds);
}
};

Google Maps Sidebar

I am using the code below to show the marker for each location saved in MySQL database.
<!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">
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'
});
var infoWindow = new google.maps.InfoWindow;
// 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");
for (var i = 0; i < markers.length; i++) {
var locationname = markers[i].getAttribute("locationname");
var address = markers[i].getAttribute("address");
var finds = markers[i].getAttribute("finds");
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 + ', No.of finds: ' + "<b>" + totalfinds + "</b>";
var icon = customIcons[totalfinds] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
title: address,
icon: icon.icon,
shadow: icon.shadow
});
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);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<div id="map"></div>
</body>
</html>
I'd now like to be able to extend the functionality of the page a little further by adding a sidebar, whereby if the user clicks on the location in the sidebar it highlights the selection with a yellow background and then pans the map to the center it on the associated marker where it opens up the info window. If the user should click on the marker, I would like the info window to open and the associated location on the sidebar to be highlighted, again, with a yellow background.
I have been researching this for sometime and I found the exact type of sidebar that I would like here http://econym.org.uk/gmap/example_map2c.html but the problem is, is that this is in v2 of the Google maps API.
I just wondered whether it would be at all possible that someone could please show me what I need to do to get this to work.
UPDATED CODE
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=yes" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>All locations</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
</head>
<div id="map_canvas" style="width: 900px;height: 600px;">
</div> <div id="locations"></div>
<body onload="showLocations()">
<script>
var map;
var markers = new Array();
function showLocations() {
downloadUrl("phpfile.php", function(data) {
var xml = data.responseXML;
markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var locationname = markers[i].getAttribute("locationname");
markerId = "id_"+i;
location_list += "<div id="+markerId+">"+locationname+"</div>";
}
document.getElementById("location_list").innerHTML = location_list;
initialize_member_map("lang")
});
}
function initialize_member_map(lang) {
map = new google.maps.Map(document.getElementById("map-canvas"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom: 6,
mapTypeId: 'roadmap'
});
var xml = data.responseXML;
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markers.length; i++) {
var infoWindow = new google.maps.InfoWindow;
var locationname = markers[i].getAttribute("locationname");
var address = markers[i].getAttribute("address");
var locationid = markers[i].getAttribute("locationid");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("osgb36lat")),
parseFloat(markers[i].getAttribute("osgb36lon")));
var html = "<b>" + locationname + "</b> <br/>" + address;
bounds.extend(point);
var marker = new google.maps.Marker({
map: map,
position: point,
locationid: locationid
});
markerId = "id_"+i;
bindInfoWindow(gmarker, map, infoWindow, html, markerId);
}
map.setCenter(bounds.getCenter());
map.fitBounds(bounds);
}
function scrollToMarker(index) {
map.panTo(gmarkers[index].getPosition());
}
function bindInfoWindow(marker, map, infoWindow, html, markerId) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
markerObj = document.getElementById(markerId);
google.maps.event.addDomListener(markerObj, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
map.panTo(marker.getPosition());
});
}
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>
</body>
</html>

My recommendation it's looking first documentation there you can find examples and a tutorial, then go to google playgorund which have live examples. It's completely possible make the sidebar, the only thing that you need to consider it's if the sidebar will be inside or outside of the map, in the link of the playground i are the example to make you're own controls. To store the data you need to understand how are make asynchronous calls by ajax to save the locations

Develop Reference

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Google map doesn't show markers - javascript

You have the latitude and longitude backwards in your xml: lat="-105.053293" lon="39.8658159" Your map is centered at : var latlng = new google.maps.LatLng(39.909939, -105.078369);

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