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<html><body><form action="">HTML:<input type="radio" name="fav_language" value="HTML" checked="checked"><br>CSS:<input type="radio" name="fav_language" value="CSS"><br>JavaScript:<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 buttons with the same name become unchecked.</p></body></html>