https://www.familycare.org.tw/sites/all/modules/civicrm/packages/jquery/plugins/jquery.FormNavigate.js?tm7yz2

1/**
2 * jQuery.FormNavigate.js
3 * jQuery Form onChange Navigate Confirmation plugin
4 * Browser Compatibility : IE 6.0, 7.0, 8.0; Firefox 2.0+;  Safari 3+; Opera 9+; Chrome 1+;
5 *
6 * Copyright (c) 2009 Law Ding Yong
7 * 
8 * Licensed under the MIT license:
9 * http://www.opensource.org/licenses/mit-license.php
10 *
11 * See the file license.txt for copying permission.
12 */
13 
14 /**
15  * Documentation :
16  * ==================
17  *
18  * How to Use:
19  * $("YourForm").FormNavigate("YourMessage");
20  *  -- "YourForm" as Your Form ID $("#form") or any method to grab your form
21  *  -- "YourMessage" as Your onBeforeUnload Prompt Message Here
22  *
23  * This plugin handles onchange of input type of text, textarea, password, radio, checkbox, select and file to toggle on and off of window.onbeforeunload event.
24  * Users are able to configure the custom onBeforeUnload message.
25  */
26var global_formNavigate = true;		// Js Global Variable for onChange Flag
27(function($){
28    $.fn.FormNavigate = function(message, force) {
29        window.onbeforeunload = function confirmExit( event ) {  
30            if (global_formNavigate == true) {
31                event.cancelBubble = true;
32            }  else  {
33                return message;
34            }
35        }
36        if (force) {
37            global_formNavigate = false;
38        }
39        $("input[type=text], input[type='textarea'], input[type='password'], input[type='radio'], input[type='checkbox'], input[type='file'], select").change(function(){
40            global_formNavigate = false;
41        });
42        //to handle back button
43        $("input[type='textarea']").keyup(function(){
44            global_formNavigate = false;
45        });
46        $("input[type='submit']").click(function(){
47            global_formNavigate = true;
48        });
49        $(".token-input-list-facebook").bind( "DOMNodeRemoved DOMNodeInserted", function(){ 
50            global_formNavigate = false; 
51        });
52    }
53})(jQuery);