Report abuse 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
	<head>
		<title>scripty2 test</title>
		<meta http-equiv="content-type" content="text/html; charset=utf-8" />
		<script type="text/javascript" src="prototype.s2.min.js"></script>
		<style type="text/css">
			
		</style>
		<style type="text/css" media="screen">
			html, body {margin:0}
			
			#wrapper {margin:0; padding:0; list-style:none;}
			#wrapper li {display:block; margin:0; padding:5px; border-bottom:1px solid #fff; background:gray;}
			#wrapper li.fixed {position:fixed; top:0; width:100%;}
			
			#wrapper li h1 {margin:0; padding:0;}
		</style>
	</head>
	<body>
		
		<ul id="wrapper"></ul>
		
		<script type="text/javascript">
			
			var alphabet = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'],
			list = $('wrapper'), li, offset = 0;
			
			alphabet.each(function(x){
				list.insert(new Element('li', {id:x, name:x, className:'title'}).insert('<h1>' + x + '</h1>'));
				list.insert('<li>1</li><li>2</li><li>3</li><li>4</li><li>5</li>');
			});
			
			li = $$('li.title');
			
			Event.observe(window, 'scroll', function(event){				
				li.each(function(x){
					if(x.viewportOffset().top < 0 || x.next().viewportOffset().top < 0) {
						x.addClassName('fixed');
					} else {
						x.removeClassName('fixed');
					}
				});
				delta = 0;
			});
			
		</script>
	</body>
</html>