<!DOCTYPE html>
<html>
<head>
<title>Protocol handler</title>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
</head>
<body>
<script type="text/javascript">
navigator.registerProtocolHandler("testprotocol",
"https://example.com/foobar?uri=%s",
"Test Protocol");
</script>
<a id="link" href="testprotocol:test">testprotocol link</a>
</body>
</html>