This way
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(31.80289258670676,54.3603515625),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
var latlngbounds = new google.maps.LatLngBounds();
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
google.maps.event.addListener(map, 'click', function (e) {
var latlng = new google.maps.LatLng(e.latLng.lat(), e.latLng.lng());
var geocoder = geocoder = new google.maps.Geocoder();
geocoder.geocode({ 'latLng': latlng }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[1]) {
//alert("Location: " + results[1].formatted_address + "\r\nLatitude: " + e.latLng.lat() + "\r\nLongitude: " + e.latLng.lng());
document.getElementById("txtCoordinate").value = e.latLng.lat() + ',' + e.latLng.lng();
}
}
});
});
}
</script>
<div id="dvMap" style="width: 400px; height: 400px">
</div>
<br />
<br />
Coordinate :<input type = "text" id="txtCoordinate" /><br />
Demo
