"Exclusive option" in array

<script type="text/javascript" charset="utf-8">		
	$(document).ready(function() {	
 
		// Identify this question
		var thisQuestion = $('#question{QID}');
 
		// Assign column-specific classes
		$('table.subquestions-list tr', thisQuestion).each(function(i){
			$('> *', this).each(function(i){
				$(this).addClass('column-'+i+'');
				$(this).attr('data-column', i);
			});
		});
 
		// Define the column to have exclusive answers
		var exclusiveColumn = 4;
 
		// Listeners on the radios
		$('input.radio', thisQuestion).on('click', function(e) {
			var thisCell = $(this).closest('td');
			if($(thisCell).hasClass('column-'+exclusiveColumn)) {
				setTimeout(function () {
					$('.column-'+exclusiveColumn+' input.radio:not(:checked)', thisQuestion).prop('disabled', true);
				}, 100);
			}
			if($('.column-'+exclusiveColumn+' input.radio:checked', thisQuestion).length == 0) {
				$('.column-'+exclusiveColumn+' input.radio', thisQuestion).prop('disabled', false);
			}
		});
 
		// Initial radio state
		if($('.column-'+exclusiveColumn+' input.radio:checked', thisQuestion).length != 0) {
			$('.column-'+exclusiveColumn+' input.radio:not(:checked)', thisQuestion).prop('disabled', true);
		}
    });
</script>

countif("d",self.NAOK) <= 1