.loader_div{
  position: absolute;
  top: 0;
  bottom: 0%;
  left: 0;
  right: 0%;
  z-index: 99;
  opacity:0.7;
  display:none;
  background: #ffffff url('assets/images/loader3.gif') top center no-repeat;
}




.preloader {
  position: absolute;
  top: 0;
  left: 0;
  bottom:0;
  right:0;
  width: 100%;
  height: 100vh;
  z-index: 99999999;
  background-image: url('assets/images/preload2.gif'); /* your icon gif file path */
  background-repeat: no-repeat;
  /*background-color: #FFF;*/
  background-position: center;
}