html,body {
  height: 100%;
}
#xoverlay{
position: absolute;
top: 0;
left: 0;
z-index: 90;
width: 100%;
height: 100%;
background-color: #000;
filter:alpha(opacity=60);
-moz-opacity: 0.6;
opacity: 0.6;
}
#xloading {
position: absolute;
top: 40%;
left: 0%;
height: 25%;
width: 100%;
text-align: center;
color: #fff;
font: 150% 'Lucida Grande', 'Lucida Sans Unicode', Verdana, sans-serif;
}