.sidr{
  display:block;
  position:fixed;
  top:0;
  height:100%;
  z-index:999999;
  width:260px;
  overflow-x:hidden;
  overflow-y:auto
}
.sidr.right{
  left:auto;
  right:-260px
}
.sidr.left{
  left:-260px;
  right:auto
}