RIC0H / Steam Age Verification - Auto Set & Submit

// ==UserScript==
// @name         Steam Age Verification - Auto Set & Submit
// @namespace    Steam Age Verification - Auto Set & Submit
// @description  Sets custom birth info and submits the form.
// @version      1.0
// @license      MIT
// @include      http://store.steampowered.com/agecheck/*
// @include      https://store.steampowered.com/agecheck/*
// @grant        none
// @author       RIC0H
// ==/UserScript==

(function(form) {
    form.ageDay.value = 1; /* Change this value to your birth DAY */
    form.ageMonth.value = "January"; /* Change this value to your birth MONTH */
    form.ageYear.value = 1900; /* Change this value to your birth YEAR */
    form.submit();
}(document.querySelector('#agegate_box form')));