I have been working diligently on implementing some new features into Velowear.com. One of these features is an in-page image popup. Originally I had coded it a an asp.net control within an AJAX panel, but found that this approach was not as flexible as just using pure Javascript. The only problem was that I wanted to perform some server side checking if the image existed before triggering the in-page popup. Most of what I had read said this was impossible to do via Javascript, but I knew there had to be a way...
Luckily I stumbled across some Javascript code that...