How to access variable? AS3

[MrFlash007]

I am new to AS
How to access variable page_green if not using external AS file?

Example:
var page_greenageGreen = new PageGreen();
addChild(page_green);


function loadPage(event:MouseEvent):void {

page_green.width=stage.stageWidth;
page_green.height=stage.stageHeight;
page_green.visible = true;

}

Thanks in advance