Hi
Using your demo page, I inserted a table then double clicked on it to bring up the properties window.
Next I clicked on the general tab. I selected the width box then tried to delete the text in the box.
It originally said 320px, so i pressed delete so it then said 320p which is when the javascript error appeared.
I guess you are trying to convert the text to a number but it fails.
Any chance of a fix?
thanks
Andy