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//  Auto enable/disable a submit button in a simple form

//  consiting of a single input and a submit button

//  Add 'formBtnEnable' to the input element.

//

$(document).ready(function () {

    $('.formBtnEnable').closest('form').find(':submit').attr('disabled', true)

    $('.formBtnEnable').bind('keyup blur', function(){

        $(this).closest('form').find(':submit').attr('disabled', $(this).val().length ==0 );

    });

});