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？
答：您好，我司使用4g 网络浏览器测试并无此广告，
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！
