Mac Safari browser users, why are the images on my website(see details) stretching out?

Check out the Portfolios page here: http://www.cliqimaging.com go to any of the portfolios. for some reason, the images on the different portfolios are stretching way out. It's random which ones do it, and when you refresh the one's that do it, they don't always do it again. Can anyone tell me what I can do to fix this? The programming is as follows(I use spaces because Yahoo will cut the code out if I don't.: ...etc... etc.... that's not exactly the programming, but it's what's doing the job. "showImage()" is actually "showImage1()" in that case... that was a typo.