#mask {clear:both;display:none; position:fixed;top:0px;left:0px;width:100%;height:100%;z-index:100;}
#mask .mask_bg {clear:both;position:absolute; top:0; left:0; width:100%; height:100%; min-height:100%;height: auto !important; background:#666; opacity:.6; filter:alpha(opacity=60);}

#mask_loading {clear:both;display:none; position:fixed;top:0px;left:0px;width:100%;height:100%;z-index:1000;}
#mask_loading .mask_loading_bg {clear:both;position:absolute; top:0; left:0; width:100%; height:100%; min-height:100%;height: auto !important; background:#000; opacity:.5; filter:alpha(opacity=60);}
.mask_loading_bar {clear:both;display:none; position: fixed; top: 50%; left: 50%; width:150px;height:150px;  margin:0 auto; height:auto !important;z-index:2000;}