폼없이 post 전송

/*
 * path : 전송 URL
 * params : 전송 데이터 {'q':'a','s':'b','c':'d'...}으로 묶어서 배열 입력
 * method : 전송 방식(생략가능)
 */
function post_to_url(path, params, method) {
    method = method || "post"; // Set method to post by default, if not specified.
    // 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.createElement("form");
    form.setAttribute("method", method);
    form.setAttribute("action", path);
    for(var key in params) {
        var hiddenField = document.createElement("input");
        hiddenField.setAttribute("type", "hidden");
        hiddenField.setAttribute("name", key);
        hiddenField.setAttribute("value", params[key]);
        form.appendChild(hiddenField);
    }
    document.body.appendChild(form);
    form.submit();
}

실제로 구동시킬 때 입력 예제
post_to_url('http://example.com/', {'q':'a'});