index.html

<html>

<head>
	<title>专冶各种H5的嵌入垃圾广告</title>
	<style type="text/css">
		/* 抢先 隐藏 iframe */
		body iframe {display: none;}
	</style>
</head>

<body>
	<div id="xxx_id" style="position: absolute;top:50%;left:50%;width:200px;height:200px;background: #333">
		<iframe id="abcd111" src="http://www.itomtan.com/"></iframe>
	</div>

	<script>


		var del_times = 0, deTimer = null;

		function adGo() {
			var iframe = document.getElementsByTagName('iframe')[0];
			console.log('11')
			if (iframe) {
				console.log(iframe)

				//循环 iframe 父类，直到找到body和body的下一级，然后整个嵌入的代码删除。
				var bodyNode = { tagName: '' }, iframeParent, targetNode = iframe.parentNode;
				while (bodyNode.tagName != 'BODY') {
					bodyNode = targetNode;
					if (bodyNode.tagName != 'BODY') {
						iframeParent = targetNode;
						targetNode = targetNode.parentNode;
					}
				}
				if (iframeParent) //如果iframe有父类
					bodyNode.removeChild(iframeParent);
				else
					bodyNode.removeChild(iframe);
			}
			del_times++;
			if (del_times > 8 ) window.clearInterval(deTimer)
		};


		//抢先 删除 嵌入广告
		(function(){adGo();}())


		deTimer = self.setInterval(adGo, 500);

		//ads demo
		setTimeout(() => {
			var obj = document.createElement("iframe");
			obj.frameborder = 0;
			obj.src = "http://www.itomtan.com/";
			obj.frameBorder = 0;//FF、IE隐藏边框有效
			obj.width = "100px";
			obj.height = "100px";
			obj.scrolling = "no";
			obj.style = "top: 50%;position:  fixed;"
			document.body.appendChild(obj);
		}, 2000);
	</script>
</body>

</html>