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jQuery disable/enable submit button

jQuery disable/enable submit button


   $(function () {
        $('#btnSubmit').prop('disabled', true);
        $('#txtInput').keyup(function () {
            if ($(this).val() != '') {
                $('#btnSubmit').prop('disabled', false);
            }
        });
   });

                                 OR

   $(function () {
        $('#btnSubmit').sttr('disabled', disabled');
        $('#txtInput').keyup(function () {
            if ($(this).val() != '') {
                $('#btnSubmit').removeAttr ('disabled');
            }
        });
   });
           
                        OR

document.getElementById("btnSubmit").disabled = true;



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ANIL SINGH

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