1
<h1 id="myH1">如何改变标题的样式</h1>2
<p>点击按钮改变 H1 元素的样式。</p>3
<button onclick="myFunction()">尝试一下</button>4
<script>5
function myFunction() {6
document.getElementById("myH1").style.color = "red";7
};8
</script>
<h1 id="myH1">如何改变标题的样式</h1><p>点击按钮改变 H1 元素的样式。</p><button onclick="myFunction()">尝试一下</button><script> function myFunction() { document.getElementById("myH1").style.color = "red"; };</script>