js使用post 方式打开新窗口，隐藏Url参数

function post(URL, PARAMS) {
        var temp_form = document.createElement("form");
        temp_form.action = URL;
        temp_form.target = "_blank";
        temp_form.method = "post";
        temp_form.style.display = "none";
        for (var x in PARAMS) {
            var opt = document.createElement("textarea");
            opt.name = x;
            opt.value = PARAMS[x];
            temp_form .appendChild(opt);
        }
        document.body.appendChild(temp_form);
        temp_form.submit();
    }

post(‘${contextPath}/analyse/detail.do‘,{carNum :carNum,ids:refIds});