uncheck individual radio buttons

hi, i have this code here to uncheck radio buttons individually but they don’t seem to work. i want to be able to uncheck individual radio buttons.

please help. thank you.

<script language=”JavaScript”>
<!–
function clearradio(formname,radioname) {
document.forms[formname].elements[radioname].checked = false;
}

//–>
</script>

<form name=Form1 action=”yourscript.asp” method=post>

<input type=radio name=option value=”Big” selected>Big
<input type=radio name=option value=”Small”>Small
<br>
<input type=radio name=number value=”1″ selected>1
<input type=radio name=number value=”2″>2
<br>
<input type=submit value=”Post Form”>
<input type=button value=”Clear Radio Buttons” onClick=”clearradio(‘Form1′,’option’);”>
<input type=button value=”Clear Radio Buttons” onClick=”clearradio(‘Form1′,’number’);”><br>

</form>

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