Javascript Browser Window confirm() Method get user input

Introduction

Display a confirmation box, and output what the user clicked:

Click the button to display a confirm box.

View in separate window

<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {/*from  w w w .  ja v a 2  s  .  c  o m*/
  var txt;
  var r = confirm("Press a button!");
  if (r == true) {
    txt = "You pressed OK!";
  } else {
    txt = "You pressed Cancel!";
  }
  document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>

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