How To Load the first movie

programming flash
1

I am very new with AS3, so please bear with me.

To load external movie, My button event listener has function as follows. All are well executed no error whatsoever.

My question : How to load the first movie ( the first _sectionContent) without having to click on the button?

Thanks.



		private function onClick(e:Event):void {
			var _sectionContent = e.currentTarget.content;			
			var btn = e.currentTarget;
			btn.mouseEnabled = false;
			btn.buttonMode = false;
			btn.alpha = 0.5;			

			loader = new Loader();
			loader.load(new URLRequest(_sectionContent));
			loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progressHandler, false, 0, true);
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onCompleteHandler, false, 0, true);
			
		}
		
		
		private function progressHandler(e:ProgressEvent):void {
			addChild(preloaderBar);
			if ((e.bytesLoaded) == (e.bytesTotal)) {
				preloaderBar.visible = false;
				}
			preloaderBar.x = 100;
			preloaderBar.y = 100;
			preloaderBar.progressFill.scaleX = 0;	
			var percent:Number = Math.ceil((e.bytesLoaded / e.bytesTotal )*100 );
			//trace(percent + " %  loaded");
			preloaderBar.progressFill.scaleX = percent;
			preloaderBar.progress_text.x = percent;
			preloaderBar.progress_text.text = (percent + "%");

		}

		private function onCompleteHandler(e:Event):void {
			removeChild(preloaderBar);
			//percent = null;
			myMovie = MovieClip(loader.content);
			_placeHolder.addChild(myMovie);
			myMovie.play();
			loader.contentLoaderInfo.removeEventListener(ProgressEvent.PROGRESS,progressHandler);
			loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,onCompleteHandler);
			loader = null;
		}