<script>
            jQuery(document).ready(function($){

                $('#etalage').etalage({
                    thumb_image_width: 300,
                    thumb_image_height: 400,
                    source_image_width: 800,
                    source_image_height: 1000,
                    show_hint: true,
                    click_callback: function(image_anchor, instance_id){
                        alert('Callback example:\nYou clicked on an image with the anchor: "'+image_anchor+'"\n(in Etalage instance: "'+instance_id+'")');
                    }
                });

            });
        </script>