>>

>>return typeof loWindow.pageYOffset != 'undefined' ? loWindow.pageYOffset: document.documentElement.scrollTop?
>> document.documentElement.scrollTop: document.body.scrollTop? document.body.scrollTop:0
>>

    if (typeof loWindow.pageYOffset != 'undefined') {
>        return loWindow.pageYOffset;
>    }
>    if (document.documentElement.scrollTop) {
>        return document.documentElement.scrollTop;
>    } 
>    return 0;

Yesterday, I came up with this. I do not think that code takes care of all the possibilities. Mine seems to do so:

   function PositionTop()
   {
      lnOffset=0
      loWindow=window.parent.oParent
      if (loWindow.pageYOffset)
      {
         lnOffset=loWindow.document.documentElement.scrollTop
      }
      else
      {
         lnOffset=loWindow.document.body.scrollTop
      }
      return lnOffset
   }