Find Latitude Longitude by Address

HTML

<script src="http://maps.google.com/maps/api/js?libraries=places&region=uk&language=en&sensor=true"></script>

Address:
<input id="searchTextField" type="text" size="50" style="text-align: left;width:357px;direction: ltr;">
<br>
            latitude:<input name="latitude" class="MapLat" value="" type="text" placeholder="Latitude" style="width: 161px;" disabled>
            longitude:<input name="longitude" class="MapLon" value="" type="text" placeholder="Longitude" style="width: 161px;" disabled>

    <div id="map_canvas" style="height: 350px;width: 500px;margin: 0.6em;"></div>

JavaScript

$(".MapLat").on(keyup,function(){
var defaultBounds = new google.maps.LatLngBounds(
  new google.maps.LatLng(-33.8902, 151.1759),
  new google.maps.LatLng(-33.8474, 151.2631));

var input = document.getElementById('searchTextField');

var searchBox = new google.maps.places.SearchBox(input, {
  bounds: defaultBounds
});
})