/**
 * addon by Egor SpirITzzz Dubrovsky (http://spiritzzz.com/)
 * jQuery.FormNavigate.js
 * jQuery Form onChange Navigate Confirmation plugin
 * Browser Compatibility : IE 6.0, 7.0, 8.0; Firefox 2.0+;  Safari 3+; Opera 9+; Chrome 1+;
 *
 * Copyright (c) 2009 Law Ding Yong
 * 
 * Licensed under the MIT license:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * See the file license.txt for copying permission.
 */
 
 /**
  * Documentation :
  * ==================
  *
  * How to Use:
  * $("YourForm").FormNavigate("YourMessage");
  *  -- "YourForm" as Your Form ID $("#form") or any method to grab your form
  *  -- "YourMessage" as Your onBeforeUnload Prompt Message Here
  * Addon:
  * $("YourForm").FormNavigate({
  *     message: "Message! \n Confirm?",
  *     aOutConfirm: "#DivID a.confirm, #DivID2 a"
  * });
  * aOutConfirm - optional, default - a;
  *
  * This plugin handles onchange of input type of text, textarea, password, radio, checkbox and file to toggle on and off of window.onbeforeunload event.
  * Users are able to configure the custom onBeforeUnload message.
  */
var global_formNavigate = true;		// Js Global Variable for onChange Flag
(function($){
    $.fn.FormNavigate = function(options){
        window.onbeforeunload = confirmExit;
        
        var defaults = { 
            message: '',          
            aOutConfirm: 'a[target!=_blank][target!=blank]'         
        };
        var settings = $.extend(false, defaults, options);
         
        function confirmExit(){  
            if (global_formNavigate){}
            else {
                return settings.message; 
            }
        }
       
        if (options.aOutConfirm && options.aOutConfirm != defaults.aOutConfirm){   
            $(settings.aOutConfirm).each(function(){
                $(this+"[target!=_blank][target!=blank]").addClass("aOutConfirmPlugin");       
            });

            $("a:not([class~='aOutConfirmPlugin'], a[target!=_blank][target!=blank])").click(function(){    
                global_formNavigate = true;       
            });
        }
        
        $(settings.aOutConfirm).click(function(){
            if (global_formNavigate == false){
                if(confirm(settings.message)){
                    global_formNavigate = true;
                    return true;
                }  else return false;
            }
        });

        $(this).find("input[type=text], input[type='textarea'], input[type='password'], input[type='radio'], input[type='checkbox'], input[type='file']").live('change keypress', function(event){
            global_formNavigate = false;
        });
        
        $(this+ ":submit").click(function(){
            global_formNavigate = true;
        });
    }
})(jQuery);