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<!DOCTYPE html>
<html>
<head>
<script
src="https://ajax.googleapis.com/ajax/libs/prototype/1.7.2.0/prototype.js">
</script>
<script>
function myFunction() {
  $("h01").insert("Hello Prototype!");
}
Event.observe(window, "load", myFunction);
</script>
</head>
<body>
<h1 id="h01"></h1>
</body>
</html>