<form name='frm1' method='post'>
a)&nbsp;<input type='radio' value='0' name='quest1' checked>0<br>
b)&nbsp;<input type='radio' value='2' name='quest1'>2<br>
c)&nbsp;<input type='radio' value='4' name='quest1'>4<br>
d)&nbsp;<input type='radio' value='6' name='quest1'>6<br>
<input type='button' value='submit' name='submit' OnClick="for(var i = 0; i < quest1.length; i++) if (document.frm1.quest1[i].checked==true) alert(document.frm1.quest1[i].value);">
<br>
</form>