Unable to show the latitude and longitude in the InfoWindow - google-maps-api-3

Question

I have a java script function which I am using to display a marker on the selected position of the map and also show the latitude and longitude at the marker's location in a InfoWindow.
I could display the marker at any location but unable to show a InfoWindow with the coordinates.
This is the function:
function init()
{
var mapoptions=
{
center: new google.maps.LatLng(17.379064211298, 78.478946685791),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map=new google.maps.Map(document.getElementById("map_can"), mapoptions);
var marker;
google.maps.event.addListener(map,'click',function(event)
{
marker= new google.maps.Marker({position:event.latLng,map:map});
});
var iwindow= new google.maps.InfoWindow();
google.maps.event.addListener(marker,'click',function(event)
{
iwindow.setContent(event.latLng.lat()+","+event.latLng.lng());
iwindow.open(map,marker);
});
}
Where am I wrong? Suggestions please.

Answer 1

This is because you attach event to an empty marker object (it is unassigned at the moment when you invoke
google.maps.event.addListener(marker,'click',function(event) { ... });
Try attaching click event to the marker after you create it, e.g.:
google.maps.event.addListener(map,'click',function(event)
{
marker= new google.maps.Marker({position:event.latLng,map:map});
google.maps.event.addListener(marker,'click',function(event)
{
iwindow.setContent(event.latLng.lat()+","+event.latLng.lng());
iwindow.open(map,marker);
});
});

Answer 2

You can try this snipped code :
function addMarkerWithTimeout(position, timeout, id) {
window.setTimeout(function () {
markers.push(new google.maps.Marker({
position: position,
map: map,
icon: image1,
title: "whatever!",
draggable: true,
animation: google.maps.Animation.ROUTE
}));
google.maps.event.addListener(map, 'click', function (event)
{
google.maps.event.addListener(markers[id], 'click', function (event)
{
infoWindow.setContent(event.latLng.lat() + "," + event.latLng.lng());
infoWindow.open(map, markers[id]);
});
});
}, timeout);
}