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<html><body><p>Click the button to create an OBJECT and a PARAM element with an embedded audio file.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { var x = document.createElement("OBJECT"); x.setAttribute("data", "horse.wav"); x.setAttribute("id", "myObject"); document.body.appendChild(x); var y = document.createElement("PARAM"); y.setAttribute("name", "autoplay"); y.setAttribute("value", "true"); document.getElementById("myObject").appendChild(y);}</script></body></html>