.sidr {
  display: none;
  position: absolute;
  position: fixed;
  top: 0;
  height: 100%;
  z-index: 999999;
  width: 260px;
  overflow-x: none;
  overflow-y: auto;
}

.sidr.right {
  left: auto;
  right: -260px
}

.sidr.left {
  left: -260px;
  right: auto
}