open all img in a plone site using overlay

feature.js

var openimginoverlay = function(){
     $('img[src$="image_tile"],img[src$="image_thumb"],img[src$="image_mini"],img[src$="image_preview"]')
     .each(function(){
       var $this = $(this);
       if (!$this.parent().is('a')){
             $this.prepOverlay({
                  subtype: 'image',
                  urlmatch: '/image_.+$',
                  urlreplace: '',
                  });
          }
      });
}