How to get a fan page Share button like this??

Hello black hatters,

I've been wondering, how to make a share button window pop within the same page, not in a new window. (To share the page from the welcome tab)

I'm using Static HTML iFrame welcome tab, and I can't get any page 'Sharing' code to pop in within the same page like that.

Ideas? Codes?

Got it to work on FBML.