(function($) {
     $.fn.mvc_load = function(url, data) {
         if (url == '')
             throw new Error('url cannot be empty.');
         $.mvc_loadUrl = url;
         this.load(url, data, function(data, status) {
             if (status == "error")
                 $.mvc_error();
             else
                 return data;
         });
     };
     $.fn.mvc_loadReplace = function(url, data, callback) {
         var self = this;
         $.mvc_get(url, data, 'html', function(response) {
             $(self).empty();
             $(self).replaceWith(response + '');
             if (callback)
                 callback(response);
         });
     };
     $.fn.mvc_ajaxForm = function(options) {
         if (options == null)
             options = {};
         $.mvc_loadUrl = $(this).attr('action');
         options.error = function(request) {
             $.mvc_error();
         };
         if (!options.target)
             options.target = this;
         this.ajaxForm(options);
     };
 })(jQuery);

 jQuery.extend({
     mvc_get: function(url, data, dataType, callback) {
         if (url == '')
             throw new Error('url cannot be empty.');
         jQuery.mvc_loadUrl = url;
         jQuery.ajax({ url: url, data: data, dataType: dataType, success: function(data) {
             callback(data);
         }, error: function(request, textStatus, errorThrown) {
             jQuery.mvc_error();
         }
         });
     },
     
     mvc_getJSON: function(url, data, callback) {
         jQuery.mvc_get(url, data, 'json', callback);
     },

     mvc_error: function() {
         window.open('/Error?url=' + jQuery.mvc_loadUrl);
     }
 });