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//var baseWidth:Number = 320;
//var baseHeight:Number = 480;

private function convert(obj:Object):void                            
{                                                                    
  var $w:Number = stage.fullScreenWidth;                           
	var $h:Number = stage.fullScreenHeight;                          
	var scale:Number = Math.max(($w/baseWidth),($h/baseHeight));     
	obj.width *= scale;                                              
	obj.height *= scale;                                             
	obj.x *= scale;                                                  
	obj.y *= scale;                                                  
}