.loading{
   position:fixed;
  top:0px;
  right:0px;
  width:100%;
  height:100%;
  background-color:#666;
  background-image:url('../images/loading.gif');
  background-repeat:no-repeat;
  background-position:center;
  z-index:10000000;
  opacity: 0.6;
  filter: alpha(opacity=40); /* For IE8 and earlier */
}