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Answers to my own questions:
a) No, not, when modifying the FCKeditor class to extend XoopsFormTextArea
b) Yes it is
I made it into an XoopsForm class, but there are a few problems.
I thought it was compatible with Mozilla 1.3+ - but it isn't with my Mozilla 1.6.
Also, the textarea itself doesn't set itself properly - this may be an error in my code, though. See screenshot.
ScreenshotOn the smiley popup, I get a button with "Undefined"
Just say so, if I've hit something, which isn't implemented yet
Also, if anyone knows how I can call a function on the parent class from the object, I'd love to know.
In the FCKeditor class, I want the render() function to call the parent's (XoopsFormDhtmlArea) render() function and use that instead, if not on a compatible browser. Can't seem to get that to work.