如题  能否使用 单选 按钮+SELECT 实现联动？

有单选按钮如下
<input name="flag" type="radio" value="0" checked="checked" />NEWS <input type="radio" name="flag" value="1" />Training
select 菜单
<select name="categoryid">
<% sql="select * from category where flag="&flag&" and ParentID = "&selec&" order by px"
'flag="&flag&" 就是 单选菜单 选中的值
    Set Rs1=Conn.Execute(sql)
    do while not rs1.eof%>
<option value="<%=int(rs1("id"))%>" ><%=rs1("category")%></option>
<% rs1.movenext
loop
rs1.close
set rs1=nothing%>
</select>

楼主的意思是单选按钮选择后select被改变？
<script language="javascript">
function flag_Click(Rad)
{
    if(Rad.checked)
       self.location="abc.asp?flag="+Rad.value;
    //假设当前页为abc.asp，这里改成楼主网页的文件名
}      
</script>
<input name="flag" type="radio" value="0" onClick="flag_Click(this);" checked="checked" />NEWS <input type="radio" onClick="flag_Click(this);"  name="flag" value="1" />Training
select 菜单
<select name="categoryid">
<%
 if Request("flag")<>"" Then   
  sql="select * from category where flag="&Request("flag")&" and ParentID = "&selec&" order by px"
'flag="&flag&" 就是 单选菜单 选中的值
    Set Rs1=Conn.Execute(sql)
    do while not rs1.eof%>
<option value="<%=int(rs1("id"))%>" ><%=rs1("category")%></option>
<% rs1.movenext
loop
rs1.close
set rs1=nothing
End IF
%>
</select>