Upper/lower limits of Math.random

Question

Hi,
I currently have applied a random range to my Mouse Cursor. So it fluctuates on the Y axis.
However it obviously takes any value between 0 and 10.
I would like it to either take 0 or 10.  I know you can use math.round / ceil, but does anyone know how I could achieve this?
Thanks.
var mouseposy = mouseY;
          var mouseposx = mouseX;
const DURATION:Number = 1;
const VERTICAL_RANGE:Number = 10;
var timer:Timer = new Timer( 50, DURATION * 20 );
timer.addEventListener( TimerEvent.TIMER, onTimer );
timer.addEventListener( TimerEvent.TIMER_COMPLETE, onTimerComplete );
timer.start();
function onTimer( $event:TimerEvent ):void
    myCursor.y = mouseposy - (VERTICAL_RANGE * ( Math.random() * 5 ));
          myCursor.x = mouseposx
          stage.removeEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
          myCursor.visible = true;
function onTimerComplete( $event:TimerEvent ):void
    x = y = 0;
          stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);

Answer 1

try replacing with these lines
const VERTICAL_RANGE:Number = 1
myCursor.y = mouseposy - ((VERTICAL_RANGE * Math.ceil( Math.random() * 2 ))* 10);