This will happen anytime you click on a link on the web page containing your Web Top session, or even if you simply click outside of the Advent application frame with your mouse.

To reactivate your Advent Web Top session, simply click anywhere in the Advent application frame in your web browser with the left mouse button. This will give Advent the focus of the web browser, which will then redirect input from the keyboard to the Advent application rather than the browser window itself.<>

I use Internet Explorer, but the function keys (for example F11 to toggle 'Fullscreen' mode) do not seem to be responding. Instead, Advent is trying to process them. How can I make the function keys affect the web browser instead of Advent?

http://www.bankrate.com/brm/green/define/autodef.asp

http://www.mobankers.com/creddef.htm