ent.getElementsByTagName('iframe');
            for (var i = 0,il=iframe.length;i<il;i++) {
                var a = iframe[i];
                a.style.zoom = 1/window.__zoom;
                var src_ = a.getAttribute('data-src')||"";
                if(!/http(s)*\:\/\/v\.qq\.com\/iframe\/(preview|player)\.html\?/.test(src_)){
                    continue;
                }
                var ratio = a.getAttribute("_ratio");
                var vid = a.getAttribute("_vid");
                a.removeAttribut