$(document).ready(function() {
        $.blockUI({
            message: $('#komunikat'),
            css: {
                top:  ($(window).height() - 550) /2 + 'px',
                left: ($(window).width() - 850) /2 + 'px',
                width: '800px'
            }
        });

        setTimeout($.unblockUI, 7000);
		  $('#komunikat').click($.unblockUI);

});