floating filter search

<style type="text/css">
#ffs {
  top: 0;
	left: 0;
	position: fixed;
	padding: 5px;
	background: #DDD;
	
}
#ffs input {
	font: 13px arial;
	color: black;
}
</style>  

<script type="text/javascript">
	$(function() {
		/* floating filter search */
				
		// set these
		var container = '#poks li';
		var target = 'span';

		$('#ffs input').keyup(function(e) {
			if (e.keyCode == 27) {
				$(this).val("");
			}
			var search = $(this).val().toLowerCase();
			
			$(container).each(function() {
				var element = $(this).closest($(container));
				$(this).find(target).text().toLowerCase().indexOf(search) == -1 ? element.hide() : element.show();
			});
		});
	});
	</script>

	<div id="ffs">
		<input type="text" name="search" placeholder="find">
	</div>