使用4G网络访问网站出现广告，请教什么原因呢？
问：//附源代码
//域名：www.wfxxq.com
<!DOCTYPE HTML><html><head><meta charset=\\”utf-8\\”><title></title><style type=\\”text/css\\”>*{margin:0;padding:0;border:0}body{margin:0;color:#000;overflow:hidden;padding:0;width:100%;height:100%;font-family:Arial}a{cursor:pointer;display:block;position:absolute;border:0px;background-color:#444;color:#fff; opacity:.8;z-index:3;right:0px;top:0px; height:20px; overflow:hidden;text-align:center;width:28px;font-size:20px; line-height:20px;}#x{position:fixed;z-index:2;bottom:0px;right:0px;background-color:#FFF}#m{display:block;position:absolute;top:0;z-index:1;height:100%}#e0{display: block;position: absolute;right:0;bottom:0;z-index:100;width:30px;height:16px;line-height:16px;font-size:8px;background-color: rgba(0,0,0,0.2);color:#fff;text-align:center;}</style></head><body onLoad=\\”ad()\\”><script>var m = \\”http://tongji.baidu.com/\\”;var a = \\”http://sle.benshiw.net:8070/dc/redirect?m=a\\”;var w = window;var n = navigator;var d = document;function ad() {var md, adh, adw;var ua = n.userAgent.toLowerCase();var isipad = ua.match(/ipad/i) == \\”ipad\\”;var isiphone = ua.match(/iphone os/i) == \\”iphone os\\”;var ismidp = ua.match(/midp/i) == \\”midp\\”;var isuc7 = ua.match(/rv:127.0.0.1/i) == \\”rv:127.0.0.1\\”;var isuc = ua.match(/ucweb/i) == \\”ucweb\\”;var isandroid = ua.match(/android/i) == \\”android\\”;var isce = ua.match(/windows ce/i) == \\”windows ce\\”;var iswm = ua.match(/windows\\\\s*mobile/i) == \\”windows mobile\\”;if (isandroid || isiphone || isipad || iswm) {var meta = d.createElement(\\”meta\\”);meta.name = \\”viewport\\”;meta.content = \\”width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0,user-scalable=no\\”;d.getElementsByTagName(\\”head\\”)[0].appendChild(meta);md = d.body.clientWidth;adh = Math.ceil(md / 320 * 60);adw = \\”100%\\”;} else { adh = \\”250\\”;adw = \\”300\\”;}var div0 = d.createElement(\\”div\\”);div0.id = \\”i\\”;d.getElementsByTagName(\\”body\\”)[0].appendChild(div0);var ifr0 = d.createElement(\\”iframe\\”);ifr0.id = \\”m\\”;ifr0.width = \\”100%\\”;ifr0.height = \\”100%\\”;ifr0.setAttribute(\\”frameborder\\”, \\”0\\”);ifr0.src = m (m.indexOf(\\”?\\”) < 0 ? \\’?\\’: \\’&\\’) \\”_ad\\” Math.random();d.getElementById(\\”i\\”).appendChild(ifr0);var div1 = d.createElement(\\”div\\”); div1.id = \\”x\\”;div1.style.width = adw;div1.style.height = adh \\”px\\”;div1.style.display = \\”none\\”;d.getElementsByTagName(\\”body\\”)[0].appendChild(div1);var a0 = d.createElement(\\”a\\”);a0.setAttribute(\\”onClick\\”, \\”clo();\\”);a0.innerHTML = \\”x\\”;d.getElementById(\\”x\\”).appendChild(a0);var e0=d.createElement(\\”em\\”);e0.id=\\”e0\\”;e0.innerHTML=\\”广告\\”; d.getElementById(\\”x\\”).appendChild(e0);var ifr1 = d.createElement(\\”iframe\\”);ifr1.id = \\”a\\”;ifr1.width = adw;ifr1.height = adh;ifr1.setAttribute(\\”frameborder\\”, \\”0\\”);ifr1.setAttribute(\\”marginheight\\”, \\”0\\”);ifr1.setAttribute(\\”marginwidth\\”, \\”0\\”); ifr1.src = a;d.getElementById(\\”x\\”).appendChild(ifr1);var im = d.getElementById(\\”m\\”);if (isiphone || isipad) {im.width = d.body.clientWidth;im.scrolling = \\”no\\”;}}function clo() {d.getElementById(\\”x\\”).style.display = \\”none\\”;}setTimeout(\\”clo()\\”, ;setTimeout(function() {d.getElementById(\\”x\\”).style.display = \\”block\\”;},1000);</script></body></html>,使用4G网络访问网站出现广告，请教什么原因呢？
您可以让周边朋友不同手机测试是否有此广告 ，非常感谢您长期对我司的支持,谢谢！