why can;t i upload my photos, and keep getting "kill this page

[churchstreet3]

whilst trying to upload photos to sell an item, i keep getting a "kill this page" or "wait".........but nothing happens

what is the problem.

thank you

[bestchoicebrand]

The photos you use must be at least 500 pixels on the longest side.

http://pages.ebay.ca/help/sell/pictures.html