javascript的一个问题不懂呀，求助

谁能将下面asp代码转为javascript的，谢谢了
<%
sousuo=request.form("sousuo")
wd=request.form("wd")
select case sousuo
case 10
response.redirect "http://www.google.cn/search?q="&wd&"&ie=gb&oe=UTF-8&hl=zh-CN&client=aff-avalanche&forid=1"
case 11
response.redirect "http://www.baidu.com/baidu?tn=yokcomdg&word="&wd&""
case 12
response.redirect "http://www.yahoo.com.cn/search?p="&wd&"&pid=200523_1006&source=yisou_union_2652"
case else
end select

%>

<script>
function x_search(){
var S = sousuo.value;
var W = wd.value;
switch (S)
case 10:
top.location="http://www.google.cn/search?q="+wd+"&ie=gb&oe=UTF-8&hl=zh-CN&client=aff-avalanche&forid=1";
break;
case 11:
top.location="http://www.baidu.com/baidu?tn=yokcomdg&word=" + wd
break;
case 12:
top.location="http://www.yahoo.com.cn/search?p="+wd+"&pid=200523_1006&source=yisou_union_2652"
break;
default:
top.location="http://www.google.cn/search?q=