Truly sorry, I forgot that the example I copied this out of was from  
long ago, when Prototype 1.5 was new. Plus, when I translated it from  
a very specific example to something more generic, I made some  
mistakes (f.e. the element being extended is wrong).

That's a fully working page example, works in the latest of everything.


On Feb 21, 2009, at 12:15 PM, SamuelXiao wrote:

> it is not work.  Anyway, I solved the problem use a hard code way.
> But I really hope I can run the program by using your suggested way.

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