console 命令行工具 X clear
console
<!DOCTYPE html>
<html>

<head>
	<meta charset="utf-8">
	<title>DOM的学习</title>
	<script>
		function xiugai(){
        var text1 = document.getElementById('DOM')
        console.log('<p>'+document.getElementById('DOM').innerHTML+'</p>')
        text1.innerHTML=prompt('请输入要修改成的内容')
        var bgcolor = document.getElementById('body')
        var i='f00'//颜色值
        bgcolor.setAttribute('bgcolor','#'+i)
        }
        //window.onload = xiugai网页加载完毕时调用函数xiugai
	</script>
</head>

<body id='body'>
	<h1 id='DOM'>DOM的使用</h1>
	<button onclick="xiugai()"><center>修改<center></button>
</body>
</html>