page changes alert

[bPHP]

Hi! How can I do a change in the html title so that, for example, when the user has my page minimized I can alert him/her that there is something new requiring his/her attention? For example in facebook when you are chatting and you minimize the window, if someone sends you a message the title is changed back and forth to call your attention... How is this done? I'm investigating but can't even find how to do it!

 

Thanks!

[F1Fan]

window.document.title = 'You new page title here.';