You didn't copy everything I posted. You need to have form before the form id to serialize - change to $("form#updateClienteForm").serialize();
Remove the document.ready()... just get rid of it/comment it out for testing.
There is quite a bit of content there. Try to create a small example and slowly rebuild. It's really hard to help with lots of code without being able to execute it myself.
Just to double check first, is this page with all the scripting your starting page? The <head> only gets executed for the first page visited - so you should have the <head> be the same on every page. This is the most common error with JQuery Mobile. If you go to the page and manually refresh do the scripts run now? Just a though.