.ui_loading_progressBar {
display: block;
width: 168px;
height: 100px;
top: 50%; 
left: 50%;
margin-left: -74px;
margin-top: -14px;
padding: 10px 10px 10px 50px;
text-align: left;
line-height: 27px;
font-weight: bold;
position: absolute;
z-index: 2001;
}
.ui_loading_background {
display: block;
width: 100%;
height: 100%;
opacity: 0.4;
filter: alpha(opacity=40);
background:while;
position: absolute;
top: 0;
left: 0;
z-index: 2000;
}
.ui_loading_progressBar {
background:  url(ui.loading.gif) no-repeat 10px 10px;
} 
#ui_loading_overlay {
  position: absolute;
  top: 0px;
  left: 0px;
  height:100%;
  width:100%;
}

.ui_loading_hide {
  z-index:-100;
}

.ui_loading_overlayBG {
  background-color: #000;
  z-index: 99;
}