HTML radio button not working according to definition? -


from wikipedia:

"a radio button or option button type of graphical user interface element allows user choose 1 of predefined set of options."

http://en.wikipedia.org/wiki/radio_button

since that's want on page, used input button of type radio: 

    <form id="run_units">         <input type="radio" value="1">miles          <input type="radio" value="2">kilometers     </form>

and yet, when test page, it's allowing me select both miles , kilometers. doing wrong?

give each input name. names should equal.

    <input type="radio" name="distance" value="1">miles      <input type="radio" name="distance" value="2">kilometers

why use name attribute? because checkbox used in forms, , each <input> should have name, sent server.


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