How to warn the user that all unsaved changes will be lost when he is leaving the page Part 2

I come back to show some progress on How to warn the user that all unsaved changes will be lost when he is leaving the page. This is my current implementation.

    1 //Version 0.1

    2 //April 10 2011 22:54

    3 //Julian Vargas

    4 //http://gr8code.blogspot.com

    5 (function () {

    6     var userIsEditing = false;

    7     var message = "Do you really want to abandon this page?, unsaved changes will be lost."

    8 

    9     $("a").click(function (event) {

   10         if (userIsEditing)

   11             if (!confirm(message))

   12                 event.preventDefault();

   13     });

   14 

   15     $(":input, :text, :password, :radio, :checkbox").bind("keyup", function () {

   16         userIsEditing = true;

   17     });

   18 

   19 })();