@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("newsmth.net") {
     *[title="为支持水木发展请点击广告"],
     td[class="HotTitle"][colspan="2"],
     img[src*="guangg"],
     object[data*="guangg"],
     iframe[src*="ads"],
     iframe[src*="sohu.com"]{
        display:none !important;
     }
}