Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
<script type="text/javascript">
/*<![CDATA[*/
function Disable(obj,nme){
var frm=obj.form,r=frm[nme],args=Disable.arguments,z0=0,z0a;
for (z0=0;z0<r.length;z0++){
r[z0].disabled=true;
for (z0a=2;z0a<args.length;z0a++){
if (args[z0a]-1==z0){
r[z0].removeAttribute('disabled');
}
}
}
}
/*]]>*/
</script></head>
<body>
<form>
<input type="radio" name="q1" onclick="Disable(this,'q2',1,4);" />
<input type="radio" name="q1" onclick="Disable(this,'q2',2);" />
<br />
<input type="radio" name="q2" disabled="disabled"/>
<input type="radio" name="q2" disabled="disabled"/>
<input type="radio" name="q2" disabled="disabled"/>
<input type="radio" name="q2" disabled="disabled"/>
</form>
</body>
</html>