Rails spinoffs - Aug 2007 - Opera Position Oddities

Hi there,

I''ve got a long scrollable list, I''m attempting to highlight
the item
visible at the top (just like blue border in Google Reader). It''s
proving to be a little complex then first imagined!

I''m polling every while and iterating through the children of the
window until the Position.Page is non-negative.

I''m currently using:

Position.Page(item)[1] -
Position.cumulativeOffset($(''scrollwindow''))
[1]

Which is working great in Firefox and IE - giving me a relative top
value for the item to the scroll window.

But in Opera, the Page method is not changing when the div is
scrolled, rendering the code useless.

Any advice would be much appreciated!

Thanks,

Alex


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I''ve altered the prototype page function to ''solve''
this issue as
follows:

function getDistance(forElement)
{
    var valueT = 0;
    var element = forElement;
    do
    {
        valueT += element.offsetTop || 0;
        if (element.offsetParent == document.body)
            if
(Element.getStyle(element,''position'')==''absolute'')
break; // Safari fix
    } while (element = element.offsetParent);
    element = forElement;
    do valueT -= element.scrollTop || 0; while (element element.parentNode);
    return valueT - windowoffset;
}


I only needed the y-coordinate. By taking out the !window.opera
condition it worked perfectly.

Is this a legitimate change or have I created other problems
elsewhere?!?

Alex


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