external page in popup with ajax

[matkus]

OK, it's probably not a real mod, but only a BB code, but here's what i need:
user posts [SOMETAG]SOME NAME[/SOMETAG] or any other tag.
And in his post, he sees name as link to http://example.com/page.php?name=SOME
NAME
but when he will mouseover that link, popup will apear, and it's content is downloaded using AJAX from http://example.com/page2.php?name=SOME NAME
example.com is external webpage. In fact, it will be used for my own page, but on different subdomain.

I belive it should not be hard, maybe someone already made it, just I can't find it.
If someone could help me, i'd be realy grateful.