<!DOCTYPE html>
<html>
<body>
<select>
<option label="Volvo">Volvo (Latin for "I roll")</option>
<option id="myOption" label="Mercedes">Mercedes (Mercedes-Benz)</option>
</select>
<p>Click the button to change the value of the label attribute of the Mercedes option.</p>
<p><b>Tip:</b> Open the drop-down list before and after you have clicked the button.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("myOption").label = "newLabel";
document.getElementById("demo").innerHTML = "The value of the label attribute was changed from 'Mercedes' to 'newLabel'.";
}
</script>
</body>
</html>