I am not sure how to add the ui-icon ui-icon-calendar class as a datepicker image beside the text field. I want something like this: http://jqueryui.com/demos/datepicker/#icon-trigger, but it should have the jquery calendar image.
<script>
        $(function() {
            $( "#datepicker" ).datepicker({
                showOn: "button",
                buttonImage: "http://jqueryui.com/resources/demos/datepicker/images/calendar.gif",
                buttonImageOnly: true
            });
        });
</script> 
                        If you click the view source button below the example you linked to, you'll see something like this:
$('#field').datepicker({        
    buttonImage: '/images/calendar_icon.png'
});
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