.yui-pb{text-align:left;vertical-align:top;padding:0;border:none;margin:0;width:200px;height:20px;background-attachment:scroll;background-position:left top;position:relative;top:0;left:0;}.yui-pb-mask{position:absolute;top:0;left:0;width:100%;height:100%;background-attachment:scroll;z-index:1;}.yui-pb-mask td{width:50%;height:50%;background-repeat:no-repeat;border:0;padding:0;}.yui-pb-tl{background-position:top left;}.yui-pb-tr{background-position:top right;}.yui-pb-bl{background-position:bottom left;}.yui-pb-br{background-position:bottom right;}.yui-pb-bar{background-color:blue;width:100%;height:100%;margin:0;position:absolute;left:0;top:0;}