Ajax POST and CSRF

This works fine to me:

Code:

<form method="post" id="some_form">
<?=form_hidden($this->security->get_csrf_token_name(), $this->security->get_csrf_hash())?>
<input name="some_input" />
</form>

and then

Code:

$(function(){
$("body").on("submit","#some_form",function(e){
e.preventDefault();
$.ajax({
url: $(this).attr("action"),
method: $(this).attr("method"),
data: $(this).serialize()
})
.done(function(data){
//something
})
.fail(function(){})
.always(function(){});
});
});

I hope it helps.