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<html><body><p>Click the button to create a SELECT and an OPTION element.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { var x = document.createElement("SELECT"); x.setAttribute("id", "mySelect"); document.body.appendChild(x); var z = document.createElement("option"); z.setAttribute("value", "volvocar"); var t = document.createTextNode("Volvo"); z.appendChild(t); document.getElementById("mySelect").appendChild(z);}</script></body></html>