.MaskLoadingBG
{
  z-index: 98;
  top:0px;
  left:0px;
  width: 100%;
  height: 100%;
  position: absolute;
  filter: progid:DXImageTransform.Microsoft.alpha(opacity=40);
  opacity: 0.4;
  background-color: #000000;
  display: block;
}
.LoadingBlock
{
  width: 450px;
  height: 150px;
  position: absolute;
  background-color: #FFFFFF;
  border: 1px Solid #FFFFFF;
  filter:alpha(opacity=90); /* IE */
  opacity: 0.9; /* Mozilla, Opera */
  text-align: center;
  padding: 15px;
  display: block;
  vertical-align: text-bottom; 
}
.LoadingBlockText 
{
  font-size: 12px;
  color: #000000;
  font-family: Arial;
  font-weight: bold;
}