​

$.fn.disable = function(/* boolean */ isDisabled) {

    if ($(this).hasClass('datepicker') || $(this).hasClass('timepicker')) {

        var theLabel = $(this).children('label');

        var theLabelFor = $(theLabel).attr('for').split(' ');

        var labelIsDisabled = 'disabled' in theLabelFor ? true : false;

        if (isDisabled) {

            $(this).children('input').addClass('disabled');

            $(this).children('i').addClass('disabled');

​

            if (!labelIsDisabled)

                $(theLabel).attr('for', $(theLabel).attr('for') + ' disabled');

        } else {

            $(this).children('input').removeClass('disabled');

            $(this).children('i').removeClass('disabled');

            if (labelIsDisabled) {

                $(theLabel).removeAttr('for');

                var newFor = '';

                theLabelFor.forEach(function(item, index) {

                   if (item !== 'disabled')

                       newFor += newFor.length === 0 ? item : ' ' + item;

                });

                $(theLabel).attr('for', newFor);

            }

        }

    }

};

​

$("#testDate").disable(false);