Places Autocomplete in Modal

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/1.4.0/bootstrap.min.css">
<script src="http://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.0.3/bootstrap.min.js"></script>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?libraries=places&sensor=false"></script>

<div class="modal hide fade" id="map_modal">
<div class="modal-footer">
    <a href="#" class="btn" data-dismiss="modal">Close</a>
    <a href="#" class="btn btn-primary">Save changes</a>
</div>

<div class="modal-body">
    <button type="button" class="close" data-dismiss="modal">×</button>
    <div id="map_canvas" style="width:530px; height:300px"></div>
    <div class="control-group">
        <label class="control-label" for="keyword">Cari alamat :</label>
        <div class="controls">
            <input type="text" class="span6" name="keyword" id="keyword">
        </div>
    </div>
</div>

CSS

.pac-container {
    background-color: #FFF;
    z-index: 20;
    position: fixed;
    display: inline-block;
    float: left;
}
.modal{
    z-index: 20;   
}
.modal-backdrop{
    z-index: 10;        
}

JavaScript

$("#map_modal").modal({
    show: false
}).on("shown", function()
{
    var map_options = {
        center: new google.maps.LatLng(-6.21, 106.84),
        zoom: 11,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    var map = new google.maps.Map(document.getElementById("map_canvas"), map_options);

    var defaultBounds = new google.maps.LatLngBounds(
        new google.maps.LatLng(-6, 106.6),
        new google.maps.LatLng(-6.3, 107)
    );

    var input = document.getElementById("keyword");
    var autocomplete = new google.maps.places.Autocomplete(input);
    autocomplete.bindTo("bounds", map);

    var marker = new google.maps.Marker({map: map});

    google.maps.event.addListener(autocomplete, "place_changed", function()
    {
        var place = autocomplete.getPlace();

        if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
        } else {
            map.setCenter(place.geometry.location);
            map.setZoom(15);
        }

        marker.setPosition(place.geometry.location);
    });

    google.maps.event.addListener(map, "click", function(event)
    {
        marker.setPosition(event.latLng);
    });
});

$("#map_modal").modal('show');