Javascript 以 post 帶入參數並傳值

function post_to_url(params) {

            // The rest of this code assumes you are not using a library.
            // It can be made less wordy if you use one.
            var form = document.getElementById("form1");

            var hiddenField = document.createElement("input");
            hiddenField.setAttribute("type", "hidden");
            hiddenField.setAttribute("name", "login");
            hiddenField.setAttribute("value", params);

            form.appendChild(hiddenField);

            form.method = "post";
            form.submit();

        }