Question : how to prevent more than one checkbox in a list view from being checked

Hello,
I have a listview control with checkboxes enabled.  How do I prevent users from checking more than one item.

Answer : how to prevent more than one checkbox in a list view from being checked

Code Behind
rPublic.checked=true

JS:
<script>
  var rb = document.getElementById("rPublic");
  rb.checked=true;
</script>

HTML:
<input id="rPublic" runat="server" type="radio" name="Public" value="Public" onclick="Target('Public');" checked />Public