​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 确认框</h1>
​
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
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<script>
function myFunction() {
  var txt;
  if (confirm("Press a button!")) {
    txt = "您按了确定";
  } else {
    txt = "您按了取消";
  }
  document.getElementById("demo").innerHTML = txt;
}
</script>
​
</body>
</html>
​