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<html><head><script>function disable() { document.getElementById("mySelect").disabled=true;}function enable() { document.getElementById("mySelect").disabled=false;}</script></head><body><form><select id="mySelect"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option></select><br><br><input type="button" onclick="disable()" value="Disable list"><input type="button" onclick="enable()" value="Enable list"></form></body></html>