Alternate ranking question - Dynamic answer options

<script type="text/javascript" charset="utf-8"> 
	$(document).on('ready pjax:complete',function() {
 
		// Identify this question
		var thisQuestion = $('#question{QID}');
 
		// Define some "Choose" text
		var choosetext = 'Please choose...';
 
		// Number of visible rows
		var rowCount = $('tr.answer-item:visible', thisQuestion).length;
 
		// Loop through all drop-downs
		$('tr.answer-item select', thisQuestion).each(function(i) {
 
			// Reset if value is above the number of visible rows
			if($(this).val() > rowCount) {
				$(this).prepend('<option value="">'+choosetext+'</option>').val('');
				checkconditions(this.value, this.name, this.type);
			}
 
			// Remove all unnecessary options
			$('option', this).filter(function() {
				return this.value > rowCount;
			}).remove(); 
		});
 
		// Listener on the dropdowns
		$('tr.answer-item select', thisQuestion).on('change', function(e) {
			// Handle non-unique answers
			 handleDuplicates();
		});
 
		function handleDuplicates() {
			$('.question-item', thisQuestion).removeClass('duplicate-row');
			$('tr.answer-item select', thisQuestion).each(function(i) {
				if(!$(this).closest('.question-item').hasClass('duplicate-row') && $(this).val() != '') {
					var thisSelect = $(this);
					var selectedValue = $(this).val();
					$('tr.answer-item select', thisQuestion).not(this).each(function(i) {
						if($(this).val() == selectedValue) {
							$(this).closest('.question-item').addClass('duplicate-row');
							$(thisSelect).closest('.question-item').addClass('duplicate-row');
						}
					});
				}
			});
		}
		handleDuplicates();
 
		//Insert new style rules
		var newStyle = '<style type="text/css">\
							.duplicate-row { background-color: #E74C3C; }\
							.duplicate-row .answertext { color: #FFFFFF; }\
						</style>';		
		$("head link[rel='stylesheet']").last().after(newStyle);
	});
</script>