I have been working on a project that involves a lot of front-end
functionality and I noticed that Position.cumulativeOffset was not as
accurate as I had expected/needed. I also needed some more options and I
just didn''t really like having to type Position.cumulativeOffset all
the
time. I wanted to simply do element.getOffset() and be done.
After lots of time spent going back and forth with the different browsers
and nesting elements I have come up with what I believe is the most accurate
cumulative offset function cross browser. I tried everything I could think
of to keep the code as simple and small as possible. I tried to use
proprietary methods where I could but even still those didn''t give the
expected results constantly.
I''m planning on posting up all my ''extenstions'' that
I''ve made to prototype
over the last couple of months when I have the time. So I went ahead and
setup a blog (http://brandonaaron.net/) and the first entry is about this
with the code for an Element.getOffset Method. I''ve included 29
assertions
as well.
I''ve very quickly detailed a little about the method (including the
options), posted the code and unit tests.
Article
http://brandonaaron.net/articles/2006/08/10/prototype-extensions-element-getoffset
Code
http://brandonaaron.net/prototype/src/dom.js
Unit test
http://brandonaaron.net/prototype/test/unit/dom.html
Let me know if it works for you and if it does then I''ll submit a
patch.
I''ve been using it successfully for a couple of months now. I also went
throught he current patches and they did not fix all problems across all
browsers. Most of the problems come with nested positioned elements.
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