youtube video still playing in closed jquery tools tabs

[jyves]

Hello everybody,
i'm building my portfolio( http://building.jaayves.com/ ) using jquery tools tabs navigation.
i put a youtube video in one of my tabs. the problem is that if i decided to play this video and then go to an other tab the video still playing while the corresponding tabs is not active. this happen in fire fox and internte explorer.

please help

ps: i'm a complete beginner in jquery end and i'm also french so excuse my poor english