1
<p>y = 5, 计算 x = y / 2, x 为:</p>2
<button onclick="myFunction()">点我</button>3
<p id="demo"></p>4
<script>5
function myFunction() {6
var y = 5;7
var x = y / 2;8
document.getElementById("demo").innerHTML = x;9
}10
</script>
<p>y = 5, 计算 x = y / 2, x 为:</p><button onclick="myFunction()">点我</button><p id="demo"></p><script> function myFunction() { var y = 5; var x = y / 2; document.getElementById("demo").innerHTML = x; }</script>