<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Timeline iframe test - child frame</title>
</head>
<body>
<h1>Child frame</h1>
<script>
var h1 = document.querySelector("h1");
setInterval(function() {
h1.style.backgroundColor = "rgb(" + ((Math.random()*255)|0) + "," +
((Math.random()*255)|0) + "," +
((Math.random()*255)|0) +")";
h1.style.width = ((Math.random()*500)|0) + "px";
}, 300);
</script>
</body>
</html>