multiid.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Multiple IDs</title>
<style type="text/css">
#test {color: red;}
</style>
</head>
<body>

<ol>
<li id="test">Test</li>
<li id="test">Test</li>
<li>List item</li>
<li id="test">Test</li>
<li id="test">Test</li>
</ol>

</body>
</html>