<p>点击按钮,显示确认框。</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction(){ var x; var r=confirm("按下按钮!"); if (r==true){ x="你按下了\"确定\"按钮!"; } else{ x="你按下了\"取消\"按钮!"; } document.getElementById("demo").innerHTML=x; } </script>