.pr_mask_loading {width:100%;height:100%;position:absolute;z-index:99999;top:0;left:0;display:none;}
.pr_mask_loading p {position:absolute;z-index:999;width:100%;height:100%;background:#000;filter:alpha(opacity=50);opacity:0.5;margin:0px;}
.pr_mask_loading .loading_img {position:absolute;z-index:1000;left:48%;top:36%;background: url(../images/loading_img.gif) 100% 0 no-repeat;width: 78px;height: 74px;}