text: <!DOCTYPE html>
  <html>
  <body>
  
  <p>The following button shows an alert box.</p>
  <button onclick="myAlertFunction()">Click me</button>
  <br>
  
  <p>The following button shows an confirm box.</p>
  <button onclick="myConfirmFunction()">Click me</button>
  <br>
  
  <p>The following button shows an Prompt box.</p>
  <button onclick="myPromptFunction()">Click me</button>
  <br>
  
  <p id="demo"></p>
  
  <script>
  function myAlertFunction() {
      alert('Custom dialog for JS Alert functions');
  }
  function myConfirmFunction() {
      confirm("Press a button!");
  }
  function myPromptFunction() {
      var person = prompt("Please enter your name", "Harry Potter");
      if (person != null) {
          document.getElementById("demo").innerHTML =
          "Hello " + person + "! How are you today?";
      }
  }
  </script>
  
  </body>
  </html>