One "aw.js" in multi window app ?

Hello,

I use AW.UI.Grid in multi window application, main window has AW
definition:

...
<script src="../../runtime/lib/aw.js"></script>
...

I am trying to save load time for child windows witch use AW.
Why such a command in a child window (parent's window.open) does not work ??

<script>
var Mygrid = new parent.window.opener.AW.UI.Grid;
...
</script>

ak

sorry should be:
<script>
var Mygrid = new parent.window.AW.UI.Grid;
...
</script>
grid shows at child window but is empty and generate planty of errors
saying that there is no definition of AW.