x
<html><body><form action=""> <input type="radio" name="fav_language" value="HTML"><br> <input type="radio" name="fav_language" value="CSS"><br> <input type="radio" name="fav_language" value="JavaScript"></form><p><b>Note:</b> When a user clicks on a radio-button, it becomes checked, and all other radio-buttons with equal name become unchecked.</p></body></html>