鼠标滑过变色效果

var sp:Sprite=new Sprite();sp.graphics.beginFill(0xff0000);sp.graphics.drawCircle(100,100,50);sp.graphics.endFill();stage.addChild(sp);var colorInfo:ColorTransform=sp.transform.colorTransform;trace(colorInfo);sp.addEventListener(MouseEvent.ROLL_OVER,makeBlue);sp.addEventListener(MouseEvent.ROLL_OUT,makeRed);function makeBlue(event:MouseEvent):void{colorInfo.color=0x0000ff;event.target.transform.colorTransform=colorInfo;trace(colorInfo);}function makeRed(event:MouseEvent):void{colorInfo.color=0xff0000;event.target.transform.colorTransform=colorInfo;trace(colorInfo);}