How to pass arguments of pubsub to anonymous function

I have this pubsub (from a tutsplus videon on JS OOP). This works with the anonymous function in the subscriber method:

        
        /**
         * PubSubs subscribers: when user clicks on input id="medical_directive".
         * This enables/disables id="medical_directive_spouse"
         */
        MyUT.oPubSubs.subscribe( 'onChangeMedicalDirective', function() {
            var iMedicalDirective = $('input#' + this + ':checked').length;

            if ( iMedicalDirective >=  1 ) {
                //enable input id='medical_directive_spouse'
                $('#' + this + '_spouse').prop('disabled', false);
            } else {
                //uncheck the id='medical_directive_spouse'
                $('#' + this + '_spouse').attr('checked', false);
            }
        }, 'medical_directive');

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But I'm trying to extract that anon function. But I don't know how to pass the variable 'this' which is the third argument in the subscribe method above (i.e. 'medical_directive').

I have this but it doesn't work. How can I make this work?

	
        /**
	 * PubSubs subscribers: when user clicks on input id="medical_directive".
	 * This enables/disables id="medical_directive_spouse"
	 */
	MyUT.oPubSubs.subscribe( 'onChangeMedicalDirective', $('').enableSpouseCheckbox(this), 'medical_directive');

    $.fn.enableSpouseCheckbox = function(that) {
        var iMedicalDirective = $('input#' + that + ':checked').length;

        if ( iMedicalDirective >=  1 ) {
            //enable input id='medical_directive_spouse'
            $('#' + that + '_spouse').prop('disabled', false);
        } else {
            //uncheck the id='medical_directive_spouse'
            $('#' + that + '_spouse').attr('checked', false);
        }
    };

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Blessings<><,
Victor

 /**
         * PubSubs subscribers: when user clicks on input id="medical_directive".
         * This enables/disables id="medical_directive_spouse"
         */
        MyUT.oPubSubs.subscribe( 'onChangeMedicalDirective', function() {
            var iMedicalDirective = $('input#' + this + ':checked').length;

            if ( iMedicalDirective >=  1 ) {
                //enable input id='medical_directive_spouse'
                $('#' + this + '_spouse').prop('disabled', false);
            } else {
                //uncheck the id='medical_directive_spouse'
                $('#' + this + '_spouse').attr('checked', false);
            }
        }, 'medical_directive');

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