.ad-extend { width:1000px;height:90px;margin:auto;overflow:hidden;position:relative; z-index: 10;}
.ad-extend .close-btn { position:absolute; width: 43px; height: 17px; top:5px;right:10px;z-index:999;}
.ad-extend .close-btn a{ display: block; width: 43px; height: 17px; cursor: pointer;position: absolute;color: white;background: url(../images/close_white.png) 0px 0px no-repeat; text-indent: -10000px;}
.ad-extend .open-btn a{background: url(../images/open_white.png) 0px 0px no-repeat;}