You can do this with javascript, as Brian said.
However, there are some issues in the process. The primary issue is that the screen doesn't know if the user is in the middle of something. The 'find' fires no matter what.
Any fields being typed in will be erased when the 'find' event goes off. So, if your user is typing information at the moment the 'find' is fired, they will see their stuff disappear. Maybe that's ok for you. Note that 'exited' fields won't lose anything, just fields being typed in 'at the moment of the find button.'
The second issue for the screen is the fact that 'find' events put you back at the top of the grid. If the user has scrolled down and is looking at something, the find event will clear the grid and start them back at the beginning.
The third oddity is the need for a regular button that presses the 'find' on the toolbar. It might just be me, but I couldn't get the toolbar button to fire its 'click' event.
If this is a simple 'find/browse' that you just want refreshed and there's not a lot of scrolling around, then I have the solution.