.loadelement_1{
  position: fixed;
  bottom: 0px;
  left: 0px;
  right: 0px;
  top: 0px;
  background: #000;
  z-index: 9999999999999;
  opacity: 0.6;
}

.loadelement_2{
  position:fixed;
  top: 50%;
  left: 50%;
  width: 80px;
  height: 80px;
  margin-top: -40px; /*set to a negative number 1/2 of your height*/
  margin-left: -40px; /*set to a negative number 1/2 of your width*/
  z-index: 9999999999999;
}