另开一贴，原在asp,关于两个select互排

<%

Dim list

Set conn=Server.CreateObject("ADODB.Connection")

DBPath1=server.mappath("../db/db.mdb")

conn.Open "driver={Microsoft Access Driver (*.mdb)};dbq=" & DBPath1

set rs=conn.execute("select a from b")

do while not rs.eof   

   list=list&"<option>"&rs("a")&"</option>"

   rs.movenext

Loop

Rs.Close:Set Rs=Nothing

Response.write "<select id='scs' onchange='mselect()'>"&list&"</select>"

Response.write "<select id='scscms'>"&list&"</select>"

%>

<script type="text/javascript">

var option="";

function mselect(){

    var scs=document.getElementById("scs");

    var scscms=document.getElementById("scscms");

    var n=scs.selectedIndex;

    for(var i =0;i<scscms.options.length; i++){

        if(scs.options[n].text==scscms.options[i].text)

        scscms.options.remove(i);

    }

    if(option!="")scscms.add(option);

    option=new Option(scs.options[n].text,"");

}

mselect();

</script>