Setting offsetParent not working

[T0mm0]

I'm trying to set the offsetParent property of an object to a reference to document rather than the relatively positioned container that it's in.

The reason for this is that the object is a WYSIWYG editor that is regularly statically positioned but has a full screen mode where it becomes absolutley positioned. It normally sits in a relatively positioned container so when I come to fullscreen it it grows to the 0,0 point of the container rather than the document.

So I've tried several different ways and VWD tells me "htmlfile: Member not found."

function SetOffsetParent(editor)
  {
  editor.offsetParent = document;
  }

function SetOffsetParent(editor)
  {
  editor.offsetParent = editor.offsetParent.offsetParent;
  }

[mrhoo]

All of the offset properties are read only

[T0mm0]

All of the offset properties are read only

ah... I did think about that possibility.

Anyone think of any other way to achieve what I'm wanting then?