How to send "KeyUp" in hidden mode IE?

<script type="text/javascript">
$('.CountInput').keyup(function() { CountInputChange($(this)); });
	 var CountInputChange = function(input) {
		 var Type = input.attr('data-Type');
		 if (isNaN(input.val())) {
			 input.val(0);
		 }
..........

	 };
</script>