Removing External Swf Stays On Stage

programming flash
1

Hi guys just a quick one (that’s what she said) I have four buttons on my index page and I want to load a new swf to the centre of the stage every time I click one of these buttons. I can do this but I can’t remove then existing swfs please help!!

public class Index extends MovieClip
{
public var button:buttonMc;
public var aboutText:aboutTextMc;
public var portText:PortfolioTextMc;
private var portBool:Boolean = false;
private var aboutBool:Boolean = false;
private var contactBool:Boolean = false;
private var clientBool:Boolean = false;
public var file:String;
public var swfBoolean:Boolean = false;

	public function Index()
	{
		button = new buttonMc();
		addChild(button);
		button.x = 450;
		button.y = 480;
		
		var container:Sprite = new Sprite();
		
		this.addEventListener(MouseEvent.CLICK, isPressed);
	
		function isPressed(event:MouseEvent):void
		{
			if (event.target=="[object portButtonMc]")
			{
				file = "portfolio";
			}
			else if (event.target=="[object aboutButtonMc]")
			{
				file = "about";
			}
			else if (event.target=="[object contactButtonMc]")
			{
				file = "contact";
			}
			else if (event.target=="[object clientButtonMc]")
			{
				file = "client";
			}
			
			if (swfBoolean)
			{
				//container.removeChild(swf);
				swfBoolean=false;
				swf.unload();
			} 
			else if (swfBoolean=false);
			{
				
			} 
			
				var swfRequest:URLRequest = new URLRequest(file+".swf");
				var swf:Loader = new Loader();
				swf.load(swfRequest);
				
				swf.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
				swf.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, preloader);
				
				function preloader(event:ProgressEvent):void
				{
					var percent:Number = Math.round(event.target.bytesTotal / event.target.bytesTotal* 100);
					preload.text = String(percent) + "%";
					addChild(preload);
				}
				
				function onComplete(event:Event):void
				{
					addChild(container);
					container.addChildAt(swf, 0);
					swf.x = 100;
					swf.y = 230;
					removeChild(preload);
					swfBoolean=true;
				}
			
		}
	}
}

}