<form name="form1" method="post" action="">
<input type="radio" name="radiobutton" value="1" onclick="document.all.b123.style.display='none'">
<input type="radio" name="radiobutton" value="2" onclick="document.all.b123.style.display=''">
<select name="b123" style="display:none"></select>
</form>
<input type="radio" name="radiobutton" value="1" onclick="document.all.b123.style.display='none'">
<input type="radio" name="radiobutton" value="2" onclick="document.all.b123.style.display=''">
<select name="b123" style="display:none"></select>
</form>
function cjq()
{
form1.aaa.disabled=false;
form1.mei.checked=false;
}
function cjq1()
{
form1.aaa.disabled=true;
form1.chu.checked=false;
}
</script>
<form name="form1">
<input name="chu" type="radio" value="1" onClick="cjq()">
<input name="mei" type="radio" value="2" onClick="cjq1()">
<select name="aaa"></select>
</form>