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jQuery




Checkbox checked



        
           if ($('#ck_field').prop('checked')) {

           }

           ....

           var checked = $('#ck').filter(':checked').val() ? 'true' : 'false';


http://jquery-howto.blogspot.ro/2013/02/jquery-test-check-if-checkbox-checked.html
http://stackoverflow.com/questions/426258/how-do-i-check-a-checkbox-with-jquery
http://stackoverflow.com/questions/596351/how-can-i-get-which-radio-is-selected-via-jquery