<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<embed src="九张机.mp3" hidden="true" autostart="true" loop="true"/>
</head>
<body>
<button>点击</button>
<p>abc</p>
<script>
//document.write() 文档加载完后调用会引发页面重绘
var btn=document.querySelector('button');
btn.onclick=function(){
document.write('<div>123</div>');
}
//element.innerHTML=
//doclument.createElement().
</script>
</body>
</html>
