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