百度知道自动签到，虾米自动签到

Auto_Check.user.js

// ==UserScript==
// @name       Auto Check
// @namespace  http://www.einverne.tk/
// @version    2014.05.23
// @description  百度知道自动签到，虾米自动签到
// @match      http://zhidao.baidu.com/question/*
// @match	   http://*.xiami.com/*
// @copyright  2012+, einverne
// ==/UserScript==

(function(){
    var signInTimer = setInterval ( function() {
            var signInBtn = document.querySelector ("#signin-btn");
            if (signInBtn) {
                clearInterval (signInTimer);
                var clickEvent  = document.createEvent ('MouseEvents');
                clickEvent.initEvent ('click', true, true);
                signInBtn.dispatchEvent (clickEvent);
            }

            var xiamiCheckBtn = document.querySelector(".action");
            if(xiamiCheckBtn) {
                clearInterval(signInTimer);
                var clickEvent = document.createEvent('MouseEvents');
                clickEvent.initEvent('click',true,true );
                xiamiCheckBtn.dispatchEvent(clickEvent);
            }
        }
        , 200
    );
}());