Today i've try this cool javascript by Lokesh Dhakar called Lightbox JS v2.0

Quoting from the author :
Lightbox JS is a simple, unobtrusive script used to overlay images on the current page. It's a snap to setup and works on all modern browsers.

So, time for a little demo about this lightbox thing, when the javascript is ready then you can click on the picture and wait for a sec as the picture is loading ;)

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