.sidr{
  display:block;
  position:fixed;
  top:0;
  height:100%;
  z-index:499;
  width:260px;
  overflow-x:hidden;
  overflow-y:auto;
  }

.sidr-open .sidr{
  -webkit-box-shadow: 0px 0px 20px 5px rgba(0,0,0,0.33);
  -moz-box-shadow: 0px 0px 20px 5px rgba(0,0,0,0.33);
  box-shadow: 0px 0px 20px 5px rgba(0,0,0,0.33);
}

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

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