​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>单击该按钮可显示 1 到 100 之间的随机数。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("demo")
  x.innerHTML = Math.floor((Math.random() * 100) + 1);
}
</script>
​
</body>
</html>
​