So, here is one thing you have to keep in mind: The same-origin-policy for networking. http://hyperhh.de/html5/testFetch-9.0.0-dp-7X.html works with loading images but this one fails: http://hyperhh.org/html5/testFetch-9.0.0-dp-7X.html There is no other difference but using .org instead of .de Both point to identic files (files to load have relative paths).