Laptop pedal to page up-down

Help anyone! Does anyone know of a foot pedal or a hands free device to page up and down on a laptop. It's difficult to hit the page up/down buttons when you get to the bottom of a page of music while playing. Thanks for any info.

Gordon , Mr. G

http://airturn.com/

This is what I've been using and love it.

http://bilila.com/pagescore_turner

Thanks Bernie and Scott , I have not seen either of these so I will check them out. Thank you much . Mr. G

Mr G if you decide on an airturn I have my older one (upgraded the firmware to then latest one) for sale pretty cheap. Not been used much at all...truly..

Let me know via PM if interested

Dennis