#pagetop{
  position: fixed;
  right: 4%;
  bottom: 4%;
  opacity: 0;
  -ms-filter: "alpha( opacity=0 )";
  filter:alpha(opacity:0);
  zoom:1;
  z-index: 9999;
  }
#pagetop a{
  display: block;
  padding: 20px;
  background: #999;
  color:#fff;
  text-decoration: none;
  opacity: .9;
  -moz-opacity: 0.9;
  filter: alpha(opacity=90);
  border-radius: 50%;
  border: none;
  outline: 0;
  font-size: .9em;
  }
#pagetop a:hover {
  cursor: pointer;
  opacity: .4;
  -moz-opacity: 0.4;
  filter: alpha(opacity=40);
  }