1. $和$$只能用于document，如果可以自己傳入element參數就好了
2. Array和Enumerable的each方法，不可以使用調用類的this變量，如果可以有第三個參數作為調用類就好了
   

HTML is a technology that handles structure. CSS is a technology that handles decoration. Use them in right way and make your code better.
HTML, who knows it? The web server, the app server or the browser? Have you ever thought of this? Web server knows nothing. App server only knows Java, C# or other dynamic language code. That is browser who knows the HTML. So what we do is just to generate the HTML formated stream and send it to browser.

1. 使用Word進行文檔寫作能力
2. 使用Visio進行繪圖能力
3. 英文交流能力：口頭和郵件
4. 軟件設計能力

這么多，哪天才能都掌握啊，一步一步來吧