Collapsible ViewPort: How to resize center items width?

[rule3]

Hi I have ViewPort with left bar and center bar split and it is collapsible and animCollapse is true..

In center box we have Managed IFrame..

In I frame ExtJS element like grids , panels , etc. width do not resize with animation and that looks stupid..

There is function on end of the scripts loaded to Iframe..

function resize() {
		grid.setHeight(Ext.lib.Dom.getViewHeight());
		grid.setWidth(Ext.lib.Dom.getViewWidth());
	}
Ext.EventManager.onWindowResize(resize);

1. When I press collabse on point below or use split's drag and drop left/center box width grid do not resize on animation and resize after center/left box is resized or collabsed..



How do I but that grid dynamically to resize with animation or split's resize?