模拟form提交

/**
 * 模拟form提交
 * @param URL
 * @param PARAMS
 */
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();
}