.ui-mask{position:absolute;z-index:10000;background:black;background:rgba(0,0,0,.5)}.ui-mask-bright{background:white;background:rgba(255,255,255,.8)}.ui-mask-empty{width:16px;height:16px;position:absolute;top:50%;left:50%;margin:-8px 0 0 -8px;background:transparent url(load.gif) no-repeat center}.ui-mask-bright .ui-mask-empty{background-image:url(load-bright.gif)}