How to remove the default arrow icon from a dropdown list (select element)?

問題：

I want to remove the dropdown arrow from a HTML <select> element. 我想從HTML <select>元素中刪除下拉箭頭。 For example: 例如：

<select style="width:30px;-webkit-appearance: none;">
    <option>2000</option>
    <option>2001</option>
    <option>2002</option>
    ...
</select>

How to do it in Opera, Firefox and Internet Explorer? 如何在Opera，Firefox和Internet Explorer中完成？

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解決方案：

參考一： https://en.stackoom.com/question/17fS7
參考二： https://stackoom.com/question/17fS7