Modal Dialogs in Javascript

A quick and dirty guide to the three types of modal (i.e. blocking) native dialog boxes available via javascript. I do not believe these are part of any spec, but every browser supports these.

NOTE: I originally wrote this in June 2005 since the available documentation on the interweb was horrible, IE only, and/or frequently wrong. Sadly still true, however this document is still accurate. I hope it helps. Enjoy. –nickg July, 2007

function testAlert() {
   alert("This is an alert");
}

function testConfirm() {
   e = document.getElementById("confirmResult");
   result = confirm("Continue?");
   if (result) {
     e.innerHTML = "OK"
   } else {
     e.innerHTML = "Cancelled"
   }
}

function testPrompt() {
   e = document.getElementById("promptResult");
   result = prompt("Type something:");
   if (result == null) {
      e.innerHTML = "Canceled";
   } else {
      e.innerHTML = "You typed: " + result;
   }
}