position: absolute;

//Iframe top offset
function getOffsetTop(elm)
{
   var mOffsetTop = elm.offsetTop;
   var mOffsetParent = elm.offsetParent;
   while(mOffsetParent)
   {
      mOffsetTop += mOffsetParent.offsetTop;
      mOffsetParent = mOffsetParent.offsetParent;
   }
   return mOffsetTop;
}

this only works as long as all offsets is relativ to its parent.
if not, like in my case, it adds the absoulutepositions of the parents.

how do i chande this:
mOffsetParent = mOffsetParent.offsetParent;
i want it to be like this:
if (???)
   mOffsetParent = mOffsetParent.offsetParent;
else
   mOffsetParent = null;

where the if (???), check if the cordinate in mOffsetParent are not absolute.