reques获取到url的参数，怎么给js使用

[头发快变秃]

<%
String partyId_ = request.getParameter("party_id") == null? "": request.getParameter("party_id");
partyId_ = SecurityUtil.escapeCode(partyId_);
String lanId_ = request.getParameter("lanId") == null? "": request.getParameter("lanId");
lanId_ = SecurityUtil.escapeCode(lanId_);
String regionId_ = request.getParameter("regionId") == null? "": request.getParameter("regionId");
regionId_ = SecurityUtil.escapeCode(regionId_);
String orgLevel_ = request.getParameter("orgLevel") == null? "": request.getParameter("orgLevel");
orgLevel_ = SecurityUtil.escapeCode(orgLevel_);

/* String url_status_ = request.getParameter("url_status") == null? "": request.getParameter("url_status");
url_status_ = SecurityUtil.escapeCode(url_status_);
String chn_code_ = request.getParameter("chn_code") == null? "": request.getParameter("chn_code");
chn_code_ = SecurityUtil.escapeCode(chn_code_); */
%>
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<script type="text/javascript">
var org_lan_id = "${sessionScope.LoginRtnParamsHashMap.vg_lan_id}";
var vg_region_id = "${sessionScope.LoginRtnParamsHashMap.vg_region_id}";
var org_id = "${sessionScope.LoginRtnParamsHashMap.vg_oper_orgId}";
var org_level = "${sessionScope.LoginRtnParamsHashMap.vg_oper_orgLevel}";
var contextPath = "${pageContext.request.contextPath}";
var pos_type_id = "${sessionScope.LoginRtnParamsHashMap.pos_type_id}";

/* var org_lan_id = "${sessionScope.LoginRtnParamsHashMap.vg_lan_id}";
var vg_region_id = "${sessionScope.LoginRtnParamsHashMap.vg_region_id}"; */
//领导首页跳转过来
var partyId_ = "<%=partyId_%>";
var lanId_ = "<%=lanId_%>";
var regionId_ = "<%=regionId_%>";
if(partyId_.length != 0){
org_id = partyId_;
}
if(lanId_.length != 0){
org_lan_id = lanId_;
}
if(regionId_.length != 0){
vg_region_id = regionId_;
}
// if(orgLevel_.length != 0){
// org_level = orgLevel_;
// }
</script>
我现在要获取js中window.location.href=url的参数值，我以前用的截取，但是在页面跳转的时候，参数传的太多，导致页面结果不一样，然后我想到了用resquest来获取，这样我怎么能给js使用？我是实习生，上面的代码后面的没看懂。。。