#loading{  background-image: url(loading.gif); background-repeat: no-repeat; background-position: center center;  position: fixed;  z-index: 999999;  top:50%;  left: 50%; width: 60px; height: 60px; margin-top: -60px; mergin-left:-60px; opacity: 0.8;display: block; text-align: center; padding-top: 80px;  color:#666;  display: none;}