You can simplify this code by using the Prototype library, but I'm including the basic DOM lookup to make things clear to all readers.
可以通过使用Prototype库简化这段代码，但我包括了基本的DOM查找以便于读者理解。
You can simplify this code by using the Prototype library, but I'm including the basic DOM lookup to make things clear to all readers.
可以通过使用Prototype库简化这段代码，但我包括了基本的DOM查找以便于读者理解。
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