app which constantly check if an application is not responding

I need an application which constantly checks if another application is "not responding" (hung). I use a Mac (Lion) and i built an application ([login to view URL]) which can be not responsive once in a while. If that happens I have to manually kill my application (via terminal or Activity monitor). So I need a program (applescript, C, whatever) which constantly checks if my application is not responsive, and if so, force quit it. Thanks!