Referencing a function on the grandparent window

Is it possible without 'opener'?

[AWildman]

Huge js challenge here. We have a grandparent window, which opens a parent window, which opens the active window. If a user closes the parent window, is it possible to reference a function on the grandparent window from the child?

In other words, If we lose our 'opener' reference by closing the second window, can the 3rd window reference a function on the first?

[Dijkgraaf]

Well I would set the reference when the page is first loaded, and as long as page3 doesn't reload you can use the grandparent reference even if the parent is closed;

<script type="text/javascript">
var parent = window.opener;
var grandparent = parent.opener;

function doit() {
grandparent.doitgrandparent();
}
</script>