Finding the V offset of an element

From	"Leonardo Azpurua" <leonardo@exmvps.org>
Newsgroups	comp.lang.javascript
Subject	Finding the V offset of an element
Date	2012-04-03 21:54 -0430
Organization	A noiseless patient Spider
Message-ID	<jlgbcm$eti$1@dont-email.me> (permalink)

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Hi,

I have to place a DIV containing a calendar on top of the input element 
where it will store the picked date.

This input element may be contained within another element (ok, I use HTML 
tables to organize labels and input controls), which may in turn be 
contained within another.

In Opera and FF, the containing hierarchy (inverted) is this:

    InputElement
        TableCellElement
            TableRowElement
                TableSectionElement
                    TableElement
                        FormElement

I wrote this (very naive) function:

function fullOffsetTop(elt)
{
    n = 0;
    while (elt && elt.offsetTop)
    {
        n += elt.offsetTop;
        elt = elt.parentNode;
    }
    return n;
}

Which has two (if not more) problems: first, both TableCellElement and 
TableRowElement have the same offset; and also, web-kit based browsers 
(Chrome and Safari) either have a different hierarchy or else offsetTop 
becomes undefined earlier.

The question is whether there is a safe (and clean, if possible) method to 
find out the absolute position of an element, no matter how deeply nested it 
is.

TIA
--

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Finding the V offset of an element "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-03 21:54 -0430
  Re: Finding the V offset of an element "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-03 22:18 -0430
    Re: Finding the V offset of an element "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-03 22:34 -0430
    Re: Finding the V offset of an element Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-04-04 14:49 +0200
      Re: Finding the V offset of an element "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-04 10:28 -0430
        Re: Finding the V offset of an element Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-04-05 09:12 +0200
      Re: Finding the V offset of an element Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2012-04-04 20:28 +0200
        Re: Finding the V offset of an element Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-04-05 09:13 +0200
      Re: Finding the V offset of an element Richard Cornford <Richard@litotes.demon.co.uk> - 2012-04-04 07:05 -0700
        Re: Finding the V offset of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-04 22:28 +0200
          Re: Finding the V offset of an element Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2012-04-05 00:44 +0200
            Re: Finding the V offset of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-05 05:50 +0200
              Re: Finding the V offset of an element Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2012-04-05 11:22 +0200
                Re: Finding the V offset of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-05 13:21 +0200
          Re: Finding the V offset of an element Richard Cornford <Richard@litotes.demon.co.uk> - 2012-04-05 04:35 -0700
            Re: Finding the V offset of an element Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-05 14:02 +0200
              Re: Finding the V offset of an element Richard Cornford <Richard@litotes.demon.co.uk> - 2012-04-10 09:32 -0700
          Re: Finding the V offset of an element John G Harris <john@nospam.demon.co.uk> - 2012-04-05 14:54 +0100
            Re: Finding the V offset of an element Gene Wirchenko <genew@ocis.net> - 2012-04-05 08:37 -0700
  Re: Finding the V offset of an element Richard Cornford <Richard@litotes.demon.co.uk> - 2012-04-04 04:57 -0700
    Re: Finding the V offset of an element Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-04-05 09:16 +0200
      Re: Finding the V offset of an element "Richard Cornford" <Richard@litotes.demon.co.uk> - 2012-04-05 09:38 +0100
        Re: Finding the V offset of an element Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-04-08 18:27 +0200
  Re: Finding the V offset of an element Dr J R Stockton <reply1214@merlyn.demon.co.uk.not.invalid> - 2012-04-06 21:52 +0100
    Re: Finding the V offset of an element "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-04-07 11:18 -0430

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