I'm trying to understand the Position object. Specially the various
offset methods. From looking at the code I think I may understand them
but I wanted to run it by the group to make sure I had a clear
understanding.
realOffset - This returns the coordinates of the element as if none of
the elements on the page are scrollable from the document edge.
cumulativeOffset - This returns the coordinates of the element from the
document edge (not taking scrolling into account or anything fancy).
positionedOffset - This will return the same thing as cumulativeOffset
most of the time, but if the element is contained in a positioned
element ('absolute' or 'relative') then it returns the coordinates from
the parentOffset of the element (which is the top-level element that is
actually positioned).
page - This is the one I really don't understand. It seems like it is
calculating the cumulativeOffset - realOffset. But I can't figure out
the purpose or why it is called "page".
Any pointers anyone could give to help me understand these methods. Most
of the documentation I have found on the web basically reads the code to
me. I am trying to understand what these method really do and why we
need them.
Eric
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