This jquery plugin allows you to turn any element into a file input element. http://plugins.jquery.com/project/custom-file
But to actually upload the file, the only documentation i could found is this:
To upload the chosen file to a server you should then attach the input element to a form element
how can i do that?
I think you need to create an html form and append the input to the form, and if you need to submit, you can do it via a submit button or via $.submit
Anyway this is not the best plugin for submiting the files via ajax.