Share Button on thumbnnail viewer.

Not satisfied with the way full image shown to users, I installed lightbox to show full image in an unobtrusive ajax popup window. It works but now I found something interesting.

Try this image.
http://www.clafy.com/?v=monsteses.jpg

And click on "share" button. The scroll seems to be moving but the page isn't.
Maybe I missed something here but can anyone point me to any guide how to make the page automatically scroll to the bottom when clicked on "share" button?

I notice that after you upload an image, you clicked on share it will automatically scroll to the bottom but on the page above it doesn't.

Hope you guys can help.