If someone types in our name it makes the PokeBase Chat Room unminimized. If you want an example, go to Pokemon Online, minimize and have someone type in your username.
While you're at it, why not make the Question header character limit larger?
I'm 99% sure it isn't possible for a web page to make the browser "unminimize" itself.
At one point it was possible to focus a particular tab or window if you were in a different tab on the same browser, but now most browsers block that I think.
