Thanks for your reply. Both of them work. The only problem is that IE now doesn't execute correctly when I use it. The hidden button is to give the user the possiblilty to login without pressing login button but by using enter key. Now that is not properly recognized in IE. but thanks for helping me really hide the submit.
I've tested with a simple form, and if you put an input type image instead of a classic submit button, then add the style="cursor: default;".
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