Fake a form posting action

postForm.js

function postForm(action, data) {
    var form = document.createElement('form');
    form.method = 'POST';
    form.action = action;
    var key, value, input;
    for (key in data) {
        value = data[key];
        if (value.indexOf('\n') < 0) {
            input = document.createElement('input');
            input.name = key;
            input.setAttribute('value', value);
        } else {
            input = document.createElement('textarea');
            input.name = key;
            input.innerHTML = value;
        }
        form.appendChild(input);
    }
    document.body.appendChild(form);
    form.submit();
    document.body.removeChild(form);
    return form;
}