[Qt-interest] Problem about QScript

[Xiaolei Shang]

  Hi:
> Hi everyone,
> is someone familiar with QScript?
> And do you know what usually causes the following error meesage?
>
> TypeError: Result of expression 'canvas' [undefined] is not an object.
>
> My code is
>
> var canvas = document.getElementById('tutorial');
> var ctx = canvas.getContext('2d');
>
> The error is throwed in the second line.  But I have checked 
>  IsObject(), the value is True,  IsUndefined(), the value is False.
>  Thanks a lot !
It looks like that the function getElementById() doesnot return an 
invalid value. You'd better check the C++ definition of getElementById() 
to see if there is valid value returned.

Cheers

Xiaolei
>
> -- 
> Best regards
> Li Zhongmiao
> Digital Media, College of Computer Science, Zhejiang University
>
>
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