$(document).ready(function() { 
    // select the thumbnails and make them trigger our overlay
    $("div.trigger a").overlay({

    	// each trigger uses the same overlay with the id "gallery"
	target: '#overlay_target',

	// optional exposing effect
	expose: '#f1f1f1'

    // let the gallery plugin do its magic!
    }).gallery({

	// the plugin accepts its own set of configuration options
	speed: 800,
        autohide: false
    });

});