<script id="myScript">

document.write("Hello World!");

</script>

<p>点击按钮返回 script 元素的内容</p>

<p id="demo"></p>

<button onclick="myFunction()">尝试一下</button>

<script>

function myFunction(){

    var x = document.getElementById("myScript").text;

    document.getElementById("demo").innerHTML = x;

};

</script>

​