get

// ==UserScript==
// @name           GET
// @namespace      HERPDERP
// @include        http://boards.4chan.org/*
// ==/UserScript==
/*
 * Edited version of: http://userscripts.org/scripts/show/101413
 * Allows Posting of your own comments.
 *
 * Instructions:
 * 1) Fill out captcha and comment
 * 2) Paste number you want in password field
 * 3) Double click the password field
 * 4) Wait for it to post
 * 5) Adjust "var s" as needed to time it right. The higher the number, the earlier the post.
 *
 * Note: Only works on normal post field, no quick reply.
*/
var first = true, n = 1;
var s = 2;
document.getElementsByName("pwd")[0].type = "text";
function check() {
    if (n == 0) return;
    var k = first ? n : (n-s);
    GM_xmlhttpRequest({
        method: "HEAD",
        url: "http://sys.4chan.org" + location.pathname.match(/\/[^\/]+\//)[0] + "imgboard.php?res=" + k,
        onload: function(response) {
            if (n == 0) return;
            if (response.status == 200) {
                if (first) {
                    alert(n + " passed");
                    n = 0;
                } else {
                    document.getElementsByName("post")[0].submit();
                }
            } else {
                first = false;
                check();
            }
        }
    });
}
document.getElementsByName("pwd")[0].addEventListener("dblclick", function(e) {
        first = true;
        n = parseInt(document.getElementsByName("pwd")[0].value);
        document.getElementsByName("pwd")[0].value = "Posting..."
        check();
}, false);