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Cannot seem to get marker clicks on Google Maps to do anything

I have a simple Google Maps feat I'm trying and failing to accomplish.
Presently, I can display my map, then cycle through a list of Projects via PHP (I'm using ExpressionEngine), and add each project's latitude/longitude to a JavaScript array.
Once the values are in the JavaScript array, I use jQuery to cycle through each one, and add a marker to the map.
I'm able to click the map and have it respond appropriately; however, when I attempt to click one of the markers, nothing happens at all.
I have tried moving code, renaming, changing, editing, and tweaking endlessly... I cannot figure this out. Any help at all would be hugely appreciated. My code is as follows:
<script>
// Create the new map_locations array
var map_locations = [];
</script>
<!-- The following ExpressionEngine script loops through all the 'projects' on the site,
then pushes each project to the map_locations array. -->
{exp:channel:entries channel="projects"}
<script>
map_locations.push( ['{url_title}', '{project_latitude}', '{project_longitude}', '{categories}{category_name}{/categories}', '{title}'] );
</script>
{/exp:channel:entries}
<script>
var marker;
function initialize() {
// To add the marker to the map, use the 'map' property
var mapOptions = {
center: { lat: 51.884 , lng: -95.147 },
zoom: 4
};
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
// Create a new location lat/long var, newLatLng
var newLatLng;
var contentString = "<div id='info_window'>this is the info window</div>"
var infowindow = new google.maps.InfoWindow({
content: contentString
});
var iconBase = '/images/map_icon_';
$.each( map_locations, function()
{
newLatLng = new google.maps.LatLng( this[1] , this[2] );
marker = new google.maps.Marker({
position: newLatLng,
map: map,
title: this[4],
icon: iconBase + this[3]
});
});
google.maps.event.addListener(marker, 'click', function() {
console.log( "This marker's url_title is: " + this[0] );
});
google.maps.event.addListener(map, 'click', function() {
console.log( "Testing map click" );
});
}
// Initialize the map
google.maps.event.addDomListener(window, 'load', initialize);
</script>

You are trying to add event listener for markers after the loop where marker gets defined rather than in the loop
Try:
$.each( map_locations, function(){
var newLatLng = new google.maps.LatLng( this[1] , this[2] );
var marker = new google.maps.Marker({
position: newLatLng,
map: map,
title: this[4],
icon: iconBase + this[3]
});
google.maps.event.addListener(marker, 'click', function(marker) {
console.log( "This marker's url_title is: " + marker.title );
});
});

Google Maps API v3 adding multiple markers w/ info windows w/ custom text

I am making a website over cyclists killed in Norway. For my project I have been using google maps api v3, but I have vague familiarity with javascript. You can see my result so far here: http://salamatstudios.com/googlemapstest/
Basicly I want to have multiple markers with infowindows on each one. Each one of the infowindows will contain:
Name (age),
Location,
Date of death,
Read more (which will be linked to a page on the website itself).
Like this example here: http://salamatstudios.com/bicycles/
I tried working with just one marker and infowindow and that worked just fine. When I want to add new markers with custom info windows on each I get stuck. At the moment I have 3 markers on different locations as seen in the first link, but none of the info windows appear when I click the marker..
How do I go around it to code it so the infowindows appear? And how can I have custom text in every infowindow? I am going to have about 30-40 markers on the map when it is done. All of the info windows will have different types of information.
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(65.18303, 20.47852),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP,
// MAP CONTROLS (START)
mapTypeControl: true,
panControl: true,
panControlOptions: {
position: google.maps.ControlPosition.TOP_RIGHT
},
zoomControl: true,
zoomControlOptions: {
style: google.maps.ZoomControlStyle.LARGE,
position: google.maps.ControlPosition.LEFT_TOP
},
streetViewControl: true,
streetViewControlOptions: {
position: google.maps.ControlPosition.LEFT_TOP
},
// MAP CONTROLS (END)
};
var map = new google.maps.Map(document.getElementById("map"),
mapOptions);
// -------------- MARKER 1
var marker1 = new google.maps.Marker({
position: new google.maps.LatLng(59.96384, 11.04120),
map: map,
icon: 'img/bike5.png'
});
// MARKER 1'S INFO WINDOW
var infowindow1 = new google.maps.InfoWindow({
content: 'Name<br />Location<br />Date<br /><br />Read more(test link)'
});
// End of infowindow code
// Adding a click event to the marker
google.maps.event.addListener(marker1, 'click', function() {
// Calling the open method of the infoWindow
infowindow1.open(map, marker);
});
// -------- END OF 1st MARKER
// -------------- MARKER 2
var marker2 = new google.maps.Marker({
position: new google.maps.LatLng(60.63040, 8.56102),
map: map,
icon: 'img/bike5.png'
});
// MARKER 2'S INFO WINDOW
var infowindow2 = new google.maps.InfoWindow({
content: 'Name<br />Location<br />Date<br /><br />Read more(test link)'
});
// End of infowindow code
// Adding a click event to the marker
google.maps.event.addListener(marker2, 'click', function() {
// Calling the open method of the infoWindow
infowindow2.open(map, marker);
});
// -------- END OF 2nd MARKER
// -------------- MARKER 3
var marker3 = new google.maps.Marker({
position: new google.maps.LatLng(60.39126, 5.32205),
map: map,
icon: 'img/bike5.png'
});
// MARKER 3'S INFO WINDOW
var infowindow3 = new google.maps.InfoWindow({
content: 'Name<br />Location<br />Date<br /><br />Read more(test link)'
});
// End of infowindow code
// Adding a click event to the marker
google.maps.event.addListener(marker3, 'click', function() {
// Calling the open method of the infoWindow
infowindow3.open(map, marker);
});
// -------- END OF 3rd MARKER
}
google.maps.event.addDomListener(window, 'load', initialize);
Would be great if some could give me a clue. I've tried searching around a bit, but I can't really find my answer. Thanks in advance! :-)

You need to attach the infowindow to the correct markers. Currently they are all associated with "marker", which doesn't exist (and should cause an error message in the javascript console when you click on the markers).
Inside the click listener change:
infowindow1.open(map, marker);
infowindow2.open(map, marker);
infowindow3.open(map, marker);
To:
infowindow1.open(map, marker1);
infowindow2.open(map, marker2);
infowindow3.open(map, marker3);
working example

In addition to HoangHieu Answer when you use for loop it better to use it this way:
marker.info = new google.maps.InfoWindow({
content: 'some text'
});
google.maps.event.addListener(marker, 'click', function() {
this.info.open(map, this);
});

google.maps.event.addListener(marker1, 'click', function() {
// Calling the open method of the infoWindow
infowindow1.open(map, marker);
});
change to
google.maps.event.addListener(marker1, 'click', function() {
// Calling the open method of the infoWindow
infowindow1.open(map, this);
});

Listener event always triggers with last element's info

I'm trying to make a map-based application, but I'm having bit of difficulty. The original code I had been working with added a separate InfoWindow for each marker, but I'd like to get it using a single InfoWindow for which I can set the content on the fly.
However, I still seem to be a little fuzzy on how JavaScript behaves, because each time any marker is clicked the InfoWindow pops up over the last marker and the alert indicates the ID of the last entry in locations.
Short snippet, problem highlighted:
function plotLocations(my_locations) {
locations = my_locations;
for(var i=0; i<locations.length; i++) {
var pos = new google.maps.LatLng(locations[i].loc_lat, locations[i].loc_lng);
var icon = new google.maps.MarkerImage(
"http://goo.gl/TQpwU",
new google.maps.Size(20,32),
new google.maps.Point(0,0),
new google.maps.Point(0,32)
);
var marker = new google.maps.Marker({
map: map,
position: pos,
animation: google.maps.Animation.DROP,
icon: icon
});
// ! -- trouble right here -- ! //
google.maps.event.addListener(marker, 'click', function() {
setPopInfo(pos, i);
});
// ! -- ------------------ -- ! //
}
}
function setPopInfo(pos, index) {
pop_info.setPosition(pos);
pop_info.open(map);
window.alert(pos+"::"+index);
}
Most of the rest of my code:
var map;
var mapBounds;
var locations;
var pop_info;
$(document).ready(init);
function init() {
var mapOptions = {
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
pop_info = new google.maps.InfoWindow({
content: "I'm not populated!",
size: new google.maps.Size(100,25)
});
google.maps.event.addListener(map, 'bounds_changed', function() {
queryLocations(map.getBounds());
});
prepareGeolocation();
doGeolocation();
}
function queryLocations(bounds) {
jQuery.ajax({
url: 'http://mydomain.com/myapp/test2.php',
data: bounds.toString(),
dataType: 'json',
success: addLocations
});
}
function addLocations(new_locations) {
document.getElementById('footer').innerHTML = new_locations;
plotLocations(new_locations);
}
My reasoning for the single InfoWindow is that once a few hundred Markers and InfoWindows have been created the performance might take a nosedive. Is what I'm trying to do feasible/advisable?

The problem occurs because you're defining your event listener callback function inside the loop. Closures refer to their context dynamically rather than binding to a copy of the data at the time of definition, so you have effectively created locations.length number of functions that are all bound to the same values of marker, pos and i, which are whatever they happened to be when the loop terminated.
To work round this, you could create a function that calls addListener outside the body of the loop, like so:
function plotLocations (my_locations) {
locations = my_locations;
for(var i=0; i<locations.length; i++) {
var pos = new google.maps.LatLng(locations[i].loc_lat, locations[i].loc_lng);
var icon = new google.maps.MarkerImage(
"http://goo.gl/TQpwU",
new google.maps.Size(20,32),
new google.maps.Point(0,0),
new google.maps.Point(0,32)
);
var marker = new google.maps.Marker({
map: map,
position: pos,
animation: google.maps.Animation.DROP,
icon: icon
});
bindEvent(marker, pos, i);
}
}
function bindEvent (marker, pos, i) {
google.maps.event.addListener(marker, 'click', function() {
setPopInfo(pos, i);
});
}

Automatically opening marker info pane on google map

I've created a custom map with most things I want on it (custom icon and custom info bubble), however I can't find a solution to automatically open the markers info window on load, I've done alot of searching but can't seem to find anything the code I have so far is as follows, any help would be much appreciated:
function initialize() {
var myLatlng = new google.maps.LatLng(54.325109,-2.742226);
var myOptions = {
zoom: 15,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var countries = [
{
title:'Remedy',
lat:54.3210,
lon:-2.7438,
content:"<h2>Remedy</h2><p>address, <br />location, <br />postcode</p> <p><b>T:</b> 07595 153 835 <br /><b>E:</b> <a href='mailto:email'>email</a></p>"
}
];
for (var i = 0; i < countries.length; i++) {
var c = countries[i];
c.marker = new google.maps.Marker({
position: new google.maps.LatLng(c.lat, c.lon),
map: map,
icon: '/wp-content/themes/remedy/display_images/google_map_icon.png',
title: c.title});
c.infowindow = new google.maps.InfoWindow({content: c.content});
google.maps.event.addListener(c.marker, 'click', makeCallback(c));
}
function makeCallback(country) {
return function () {
country.infowindow.open(map, country.marker);
};
}
infowindow.open(map, marker);
}

Maybe it's not working because you just created the instance of the Map and didn't wait for the complete load of the map to open the InfoWindow.
Try something like this:
google.maps.event.addListenerOnce(map, 'tilesloaded', function(event) {
infowindow.open(map, marker);
});
According to the reference:
http://code.google.com/intl/en/apis/maps/documentation/javascript/reference.html#Map
tilesloaded - This event is fired when the visible tiles have finished loading.

Hmm, inforwindow does not refer to anything in your code, which is why it is not working.
Since you have one country in the list as of now you can do a quick test and intialize the infowindow variable with an actual info window, or better yet also since you have 1 item in the list, just define c to be outside the loop so you can access it and then open the popup passing it the map and the marker, something like this (assuming c has been defined outside the loop)
c.infowindow.open(map, c.marker);

var infowindow = new google.maps.InfoWindow({
content: "Test Route",
position: new google.maps.LatLng(38.8709866, -77.208055),
});
infowindow.open(map);

Google Maps API v3: Close infowindow when DOM element is clicked

I'm playing around with Google maps for the first time, so I looked at a nice tutorial over at CSS Tricks: http://css-tricks.com/google-maps-slider/ I like working with jQuery better than pure JS, and this tutorial makes a nice way to click on a place in a list to display the marker in the map.
I liked it that way, but I need to add infowindows to the marker. Which I did, but when I click on a place on the list and the map pans away, the infowindow stays open! I think it's because I need to attach the infowindow.close() to the event of clicking on a "#locations li".
Here's my code, which runs on document.ready:
$(function() {
var chicago = new google.maps.LatLng(41.924832, -87.697456),
pointToMoveTo,
first = true,
curMarker = new google.maps.Marker({}),
$el;
var myOptions = {
zoom: 10,
center: chicago,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map($("#map_canvas")[0], myOptions);
$("#locations li").click(function() {
$el = $(this);
if (!$el.hasClass("hover")) {
$("#locations li").removeClass("hover");
$el.addClass("hover");
if (!first) {
// Clear current marker
curMarker.setMap();
// Set zoom back to Chicago level
// map.setZoom(10);
}
// Move (pan) map to new location
function move(){
pointToMoveTo = new google.maps.LatLng($el.attr("data-geo-lat"), $el.attr("data-geo-long"));
map.panTo(pointToMoveTo);
}
move();
// Add new marker
curMarker = new google.maps.Marker({
position: pointToMoveTo,
map: map
});
// Infowindow: contenido
var contentString = '<p>'+$el.find("h3").html()+'</p>';
contentString += 'hola' ;
var infowindow = new google.maps.InfoWindow(
{
size: new google.maps.Size(150,50),
content: contentString
});
// On click, zoom map
google.maps.event.addListener(curMarker, 'click', function() {
//map.setZoom(14);
infowindow.open(map,curMarker);
});

It looks like you're creating a new InfoWindow for each marker. Quoting from the Google Maps API Docs:
If you only want one info window to display at a time (as is the behavior on Google Maps), you need only create one info window, which you can reassign to different locations or markers upon map events (such as user clicks).
Therefore, you may simply want to create one InfoWindow object just after you initialize your map, and then handle the click event handler as follows:
google.maps.event.addListener(curMarker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map, curMarker);
});
Then the InfoWindow should automatically close when you click on a new marker without having to call the close() method.