[Хемуль]

Либо можно вставить на первый кадр отдельного слоя код:

function createRectangleMovieClip(newName:String, parentClip:MovieClip, parentClipDepth:Number, newX:Number, newY:Number, newWidth:Number, newHeight:Number, newColor:Number, newAlpha:Number):MovieClip
{
	var newClip:MovieClip = parentClip.createEmptyMovieClip(newName, parentClipDepth);
	newClip.beginFill(newColor);
	newClip.moveTo(0, 0);
	newClip.lineTo(newWidth, 0);
	newClip.lineTo(newWidth, newHeight);
	newClip.lineTo(0, newHeight);	
	newClip.lineTo(0, 0);	
	newClip.endFill();
	newClip._x = newX;
	newClip._y = newY;	
	newClip._alpha = newAlpha;
	return newClip;
}

var bannerButton:MovieClip = createRectangleMovieClip("hitButton", _root, _root.getNextHighestDepth(), 0, 0, Stage.width, Stage.height, 0xff0000, 0);

bannerButton.onRelease = function()
{
	getURL("http://mysite.com", "_blank");
}