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<html><body><select id="mySelect"> <option>Cat</option> <option>Dog</option> <option>Horse</option> </select><p>Click the button to find out if more than one option in the dropdown list can be selected.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("mySelect").multiple; document.getElementById("demo").innerHTML = x;}</script></body></html>