ioverlay

jquery tiny lightbox

$(document).ready(function ()   
    {
       $('#btnOpenObj').click(function (e) {
            $('#yourDemoDiv').ioverlay();
        });

        $('#btnCloseObj').click(function (e) {
            $('#yourDemoDiv').ioverlay('close');
        });
    }
);

demo

http://ilyax.com/ioverlay