#sidebarbgblackdiv
{
   position:fixed;
   z-index:900000000;
   width:100%
   height:100%;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
   background-color: rgba(0,0,0,0.6);
   display: none;
   transition:1s;
}