$.expr[':'].external = function(obj){
    return !obj.href.match(/^mailto\:/)
            && (obj.hostname != location.hostname);
};


$(function(){
    $('a:external').addClass('external');

    $('a.thumbnail').addClass('lightbox');
    $('a.lightbox').lightBox({
        imageLoading:			'/media/images/lightbox-ico-loading.gif',
        imageBtnPrev:			'/media/images/lightbox-btn-prev.gif',	
        imageBtnNext:			'/media/images/lightbox-btn-next.gif',
        imageBtnClose:			'/media/images/lightbox-btn-close.gif',
        imageBlank:				'/media/images/lightbox-blank.gif',
    });
});