Form send by POST only visible row

Hellou,
first I must thank you for nice datatable!

I have form with datatable. If I am using filter when I send form. The POST containts only visible data by filter, hidden not.
This is problem for user.

I try add :
$('#filter_all').click( function() {
oTable.fnFilter( '', 2 );
jqFilter.val('');
} );

into: $(document).ready(function() {


and to submit button <input type="submit" id="filter_all" value="safe">

But this didnot work maybe I use wrong the js.

I hope there is the option but I didnot find them.
Thank you in advance for help.