Add onclick on radio button

Hi,
How to add onclick on a radio button list,
I want my form submit when an user change the value on a radio in my multi-page form
I try this, but not work

jQuery(document).ready(function(){
   jQuery('#choice_20_0').bind('onchange', function (){
   	jQuery("#gform_target_page_number_1").val("3");
   	jQuery("#gform_1").trigger("submit",[true]);
   });
});

The website is on my local dev environnement,
but, for reduce user action (click) I want add onclic event on each radio input for submit my form and go on the next gravity form page ( multi-page )
by adding this on each input radio :

onclick="jQuery("#gform_target_page_number_1").val("3"); jQuery("#gform_1").trigger("submit",[true]); "

Thank you, finaly I'll use the submit button and pending the onclick on radio method