var postbackElementImages;

Sys.Application.add_load(function()
{
    Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(beginRequestImages);
    //Sys.WebForms.PageRequestManager.getInstance().add_pageLoaded(pageLoadedImages);
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandlerImages);
});

function beginRequestImages(sender, args) {
    postbackElementImages = args.get_postBackElement();
}

function EndRequestHandlerImages(sender, args)
{
    if (typeof(postbackElementImages) === "undefined") {
        return;
    } 
    else if  (postbackElementImages.id.toLowerCase().indexOf('submenu1_linkbuttonphotos') > -1) {
        $('a.lightbox').lightBox({
            imageLoading: '/images/lib/js/jquery/lightbox/lightbox-ico-loading.gif',
	        imageBtnClose: '/images/lib/js/jquery/lightbox/lightbox-btn-close.gif',
	        imageBtnPrev: '/images/lib/js/jquery/lightbox/lightbox-btn-prev.gif',
	        imageBtnNext: '/images/lib/js/jquery/lightbox/lightbox-btn-next.gif',
	        overlayBgColor: 'Gray',
	        overlayOpacity: 0.75,
	        txtOf: '/',
	        fixedNavigation: false
        });
   }
}