I solved my problem, I made a very complex system to do something very simple.
Now I must test with different configuration to see the result (Safary OSX for example...)
For the version of jQuery, I can only use the 1.8 version maximum, I don't want to change all my code (and it is so the mess that I can't change it

), and I don't understand the jQuery migration plugin.
Thank a lot for your reply.