HTML Radio Buttons

 

<form action="index.php">

 <input type="radio" name="color" value="red" /> Red<br />

 <input type="radio" name="color" value="white" /> White<br />

 <input type="radio" name="color" value="blue" /> Blue<br />

 <input type="radio" name="color" value="green" /> Green<br />

</form>