// triggers overlay 
jQuery(document).ready(function($) {
    $('body').append("<div id=\"gallery-display\"></div>");
    $(".image-gallery a").overlay({
        target: '#gallery-display',
		left: 'center',
        expose: {
            color:'rgb(22,22,22)',
            opacity : 0.50      
            }
    }).gallery({speed:'fast'});
});