Good website(s) with good visual aids on how to perform various exercises?

Good website(s) with good visual aids on how to perform various exercises?

I need to start incorperating more leg and abdominal exercises to my routine. Does anyone know of a good website that has good visuals that will aid my learning on performing various leg and abdominal exercises? Thanks

http://www.bsu.edu/webapps/strengthlab/home.htm

Ceaze http://www.bsu.edu/webapps/strengthlab/home.htm wow thanks... can anyone give tips on some of the more effective exercises to do when working out legs and abs? thanks

http://www.exrx.net/Lists/Directory.html

legs:squat leg press stiff-leg/romanian deadlift good mornings (more low back, but still good hamstring/glute activation) glute-ham raise abs:decline situps/crunches dragon flags hanging leg raises standing/kneeling cable crunches

http://www.midwestbarbell.com/videos.htm

Good website(s) with good visual aids on how to perform various exercises?