jQuery Forum

I'm relatively new to jQ and would like to determine if a named window is already open.  If it is then I want to change focus to that window/tab.

The scenario is this. I have a link in App1 that opens a new window to an already existing linked (related) web form in App2. If the user forgets they have that window open in App2 and clicks the same link in App1 as before (to open the related form in App2,) it opens a window that is not the same window as the original window. I need App1 to

1. detect if a window already exists in the browser of the same name and if so,
2. change the browser focus to it.

Any help in pointing me to the documentation would be appreciated.