[Qt-interest] Problem about QScript

[Zhongmiao Li]

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 !

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