Latitude Longitude in JavaScript by city

How to find Latitude and Longitude in JavaScript by city name?
You can easily implement in any framework like Codeigniter, Laravel, CakePHP or any other Framework.

Use below code:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script>
function getLatLong() {
    var geocoder = new google.maps.Geocoder();
    var address = "New Delhi";//document.getElementById("address").value;
    geocoder.geocode( { 'address': address}, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
       latitude = results[0].geometry.location.lat();
       longitude = results[0].geometry.location.lng();
       //alert(results[0].geometry.location.lat());
       //alert(results[0].geometry.location.lng());
       $("#locInfo").html("latitude="+latitude+" longitude="+longitude);
      }  else {
      }
    });
}
getLatLong();
</script>
<div id="locInfo" ></div>