I just covered my blog’s images by Lightbox JS v2.0. It’s a great JS tool to overlap the current page by an image. See my test here :
You can download it from Here.
What you will need is read the “index.html” example and guideline file (that comes with Lightbox JS v2.0). Don’t forget to edit the values of “var fileBottomNavCloseImage” and “var fileLoadingImage” in js/lightbox.js file.
And finally you will see the JS heaven.
Keep enjoying on !!