xxxxxxxxxx<html> <body> <h1>Basic optgroup element example</h1> <label for="song-select">Choose a song:</label> <select id="song-select"> <optgroup label="Oasis"> <option>Wonderwall</option> <option>Don't look back in anger</option> <option>Supersonic</option> </optgroup> <optgroup label="Beetles"> <option>Here comes the sun</option> <option>Hey Jude</option> <option>Let it be</option> </optgroup> </select> </body></html>