Autocomplete google map search

<script type='text/javascript' src="http://maps.googleapis.com/maps/api/js?key=AIzaSyCR4IDVupChKbdxz9IPwweWBVgC0FGB0Hw&sensor=false&libraries=places&dummy=.js"></script>


    <!-- Autocomplete Section-->
    <script type="text/javascript">
        function initialize() {
        var input = document.getElementById('Origin');
        var options = {
          componentRestrictions: {
            country: 'ca'
          }
        };

                new google.maps.places.Autocomplete(input, options);
        }

        google.maps.event.addDomListener(window, 'load', initialize);
    </script>
    <!-- Autocomplete End-->



<div onload="initialize()">
    <FORM NAME="test">
        <h4>Pickup Location:</h4>
        <INPUT TYPE="TEXT" ID="Origin" NAME="Pickup" style="width: 100%;">
    </FORM>
</div>