Javascript in 4chan 404 defeater

4chan 404 defeater is a Firefox extension used to auto refresh 4chan threads in Firefox until they 404 (without showing a 404 screen):
Website:
http://spacetaken.net/44d/

Firefox extension:
http://spacetaken.net/44d/4chan404defeater_0-4.xpi

Greasemonkey script:
http://spacetaken.net/44d/4chan404defeater_0-4.user.js

Inside that .xpi is chandefeater.js and it's identical to the Greasemonkey script. I've been using 4chan 404 defeater for a while and I don't know anything about Javascript.

I want to modify that .js so instead of the default (auto F5'ing turned off (unchecked) and refresh rate set at every 2 minutes), I want the default to be checked and 8 minutes.

From window.saveCookies, it evidently saves a cookie for each open tab, saving the scroll position (44d_scroll_pos), the F5 interval (44d_f5_rate), and whether auto F5'ing (44d_auto_f5) is on/checked/true or off/unchecked/false.

I can view those cookies in Firefox through Tools > Options > Privacy > Show cookies and doing a Search for 4chan.

If I edit the .js and change:
var autoF5Rate = readCookie("44d_f5_rate", 2);
to
var autoF5Rate = readCookie("44d_f5_rate", 8);
..that changes the default refresh rate to 8 minutes.

But if I change:
var autoF5 = readCookie("44d_auto_f5", false);
to
var autoF5 = readCookie("44d_auto_f5", true);
..it does nothing.

The terms "checked" and "auto_f5_checker" both appear 6 times in that .js

The term "document.getElementById("auto_f5_checker").checked" appears 3 times in that .js

I think it has something to do with "onlick" and ".checked"

I'm currently focuses on these portions of code:

unsafeWindow.updateAutoF5 = function(){
    var checked = document.getElementById("auto_f5_checker").checked;
    //stop or start auto f5ing
    if(checked)
        autoF5TimerId = setInterval('doF5()', 1000*60*autoF5Rate);
    else
        clearInterval(autoF5TimerId);
}

unsafeWindow.validateRate = function(){
    var field = document.getElementById("ref_rate_mins");
    autoF5Rate = parseFloat(field.value);
    if(isNaN(autoF5Rate)) autoF5Rate = 1;
    else if(autoF5Rate < 0.1) autoF5Rate = 0.1;
    field.value = autoF5Rate;        //update to possibly different-to-inputted value
    if(document.getElementById("auto_f5_checker").checked){
        clearInterval(autoF5TimerId);
        autoF5TimerId = setInterval("doF5()", Math.round(1000*60*autoF5Rate));
    }
}

window.saveCookies = function(){
    writeCookie("44d_scroll_pos", document.body.scrollTop);
    if(document.getElementById("auto_f5_checker")){
        writeCookie("44d_f5_rate", autoF5Rate);   
        writeCookie("44d_auto_f5", document.getElementById("auto_f5_checker").checked);
    }
}

How do I make it so auto F5'ing is turned on by default in that .js but can still be turned off by unchecking the box (created by window.controlNode)?

lol googling 4chan auto expand points to this thrad now :D

>>41
www.usingenglish.com
www.englishuk.com/en

>>40
They do that to ensure you don't get stale data.

<-- check em dubz

46 Name: Anonymous 2011-03-23 1:15

>>1
>I want to modify that .js so instead of the default (auto F5'ing turned off (unchecked) and refresh rate set at every 2 minutes), I want the default to be checked and 8 minutes.

There's a very dirty way to do this in Greasemonkey. Edit the script.

Find the else that has the following after it:
clearInterval(autoF5TimerId);

Remove that and paste the code from the if above:
autoF5TimerId = setInterval('doF5()', 1000*60*autoF5Rate);

This makes it auto F5 no matter if the checkbox is checked or not. But you will no longer be able to change the refresh rate via the box, only by editing the live code.

To change the refresh rate to 8 minutes, find
readCookie("44d_f5_rate",

Then change the number after it to 8

You may also need to change the line above that (change the false to true).