<SCRIPT LANGUAGE="JavaScript">
function check(radio) {
form = radio.form;
form.val.value = radio.value;
}
</SCRIPT>
<FORM METHOD="POST">
<INPUT TYPE="radio" NAME="r" VALUE="1st" checked onclick="check(this)"> 1つめ<BR>
<INPUT TYPE="radio" NAME="r" VALUE="2nd" onclick="check(this)"> 2つめ<BR>
<INPUT TYPE="radio" NAME="r" VALUE="3rd" onclick="check(this)"> 3つめ<BR>
<INPUT NAME="val" SIZE="30">
</FORM>