<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<script>
function uncheck()
{
var radio=document.getElementById("rad");
if (radio.tag==1){radio.checked=false;radio.tag=0;}
else{radio.checked=true;radio.tag=1;}
}
</script>
<BODY>
<input type="radio" id="rad" name="abc" onclick="uncheck();"/>
</BODY>
</HTML>
