function shake(n)
{
 if (parent.moveBy)
 {
  for (i = 10; i > 0; i--)
  {
   for (j = n; j > 0; j--)
   {
    parent.moveBy(0,i);
    parent.moveBy(i,0);
    parent.moveBy(0,-i);
    parent.moveBy(-i,0);
   }
  }
 }
 alert("OOPS - better check the date!");
}