shadowbox_auto.js false positive when auto handling for all image links enabled

Hi,

I found a discrepancy that conflicts with node_gallery and really any other href that just so happens to end in jpg, png, etc (anything listed in line 9 of shadowbox_auto.js).

Because the conditional statement is looking for "jpg" instead of ".jpg", if you happen to have a link that ends in that string, then shadowbox wants to pop it up in a new window.

By including the period and changing the statement to ".jpg", .png, etc... the auto-enable feature won't trigger on node pages and instead only triggers on actual image files.

Thanks ~ pj