var nl = -150;
var nr = 1200; //document.body.clientHeight;

function moveLeft() {
  if (document.all) {
    nl+=5;
      document.all["left"].style.pixelLeft = nl;
 
    if (nl < 0) {
      setTimeout("moveLeft()", 5);
    }
    else {
      document.all["left"].style.pixelLeft = 0;
    }
  }
}


function moveRight() {
  document.all["right"].style.pixelRight = 10;
//  moveLeft();

  if (document.all) {
    nr-=5;
    document.all["right"].style.pixelTop = nr;
 
    if (nr > 275) {
      setTimeout("moveRight()", 20);
    }
    else {
      document.all["right"].style.pixelTop = 275;
      moveLeft();
    }
  }

}