var _node = null, _all_match = 0, _current_match = 0;

 $(document).ready(function() {

     $('#area_setting_ou_tree').jstree({

         'core' : {

             'data' : {

                 "url" : "url",

                 "method" : "POST",

                 "dataType" : "json"

             },

             "multiple" : false,

             "check_callback" : true,

             "animation" : 0

         },

         'plugins': [

             "sort",

             "search",

             "types"

         ],

         'sort' : function(a, b) {

             return this.get_type(a) === this.get_type(b) ? (this.get_text(a) > this.get_text(b) ? 1 : -1) : (this.get_type(a) >= this.get_type(b) ? 1 : -1);

         },

         'search' : {

             'search_leaves_only' : true,

             'search_callback' : function(string,node){

                 if(string !== '' && node.type === 'staff' && node.text.toLocaleLowerCase().match(string.toLocaleLowerCase())) {

                     _instance.open_all();

                     $('#' + node.id).addClass('jstree-search');

                 }else {

                     $('#' + node.id).removeClass('jstree-search');

                 }

             }

         },

         'types' : {

             "staff" : {

                 "icon" : "url"

             },

             "ou_end" : {

                 "icon" : "url"

             },

             "ou_not_end" : {

                 "icon" : "url"

             }

         }

     }).on('search.jstree', function() {

         var _selected_node = $('#area_setting_ou_tree ul li .jstree-search');

         if(_selected_node.length === 0) return;

         var _instance =  $('#area_setting_ou_tree').jstree(true);

         _all_match = _selected_node.length;

         $('#all_selected').text(_all_match);

         _current_match = 1;

         $('#current_selected').text(_current_match);

         var node_id = '';

         _selected_node.each(function(index, dom) {

             node_id = $(this).attr('id');

             if(index === 0) {

                 _instance.select_node(node_id);

                 $('#' + node_id).addClass('jstree-search');

                 location.hash = '#' + node_id;

             }

             _node.add(node_id);

         });

     });

     var _instance =  $('#area_setting_ou_tree').jstree(true);

     /*

      * search event for Tree

      */

     var area_setting_ou_tree_to = false;

     $('#area_setting_ou_tree_search').keyup(function () {

         setTimeout(function() {

             _all_match = 0;

             _current_match = 0;

             $('#current_selected').text(0);

             $('#all_selected').text(0);

             $('#area_set_main').html('');

             _node = null;

             _node = new DoubleLinkedList();

             var _instance =  $('#area_setting_ou_tree').jstree(true);

             _instance.deselect_all();

             $('#selected_message').css('visibility','visible');

             $('#pre_selected').prop('disabled',false);

             $('#next_selected').prop('disabled',false);

             if(area_setting_ou_tree_to) { clearTimeout(area_setting_ou_tree_to); }

             area_setting_ou_tree_to = setTimeout(function () {

                 var company_department_tree_search_val = $('#area_setting_ou_tree_search').val();

                 $('#area_setting_ou_tree').jstree(true).search(company_department_tree_search_val);

             }, 250);

             if($('#area_setting_ou_tree_search').val() === '') {

                 $('#selected_message').css('visibility','hidden');

                 $('#pre_selected').prop('disabled',true);

                 $('#next_selected').prop('disabled',true);

                 $('.jstree-search').removeClass('jstree-search');

                 $('#area_set_main').html('');

             }

         }, 200);

     });

     /*

      *   next step  for Tree

      */

     $('#next_selected').on('click', function(){

         if(_node.size() === 0) return;

         var _instance = $('#area_setting_ou_tree').jstree(true);

         // selected node is not search results

         var _current_selected = null;

         if(_node.find(_instance.get_selected()[0])) {

             _current_selected = _node.find(_instance.get_selected()[0]);

         } else {

             _current_selected = _node.getHead();

             _current_match = 0;

         }

         if(_current_selected.next) {

             var _temp = _current_selected.next.element;

             _instance.deselect_all();

             _instance.select_node(_temp);

             location.hash = '#' + _temp;

             showInstitutionByClickTree(_instance.get_type(_temp), _temp);

             _current_match += 1;

             $('#current_selected').text(_current_match);

         } else {

             //跳转到第一个

             _current_match = 1;

             var _temp = _node.getHead().next.element;

             _instance.deselect_all();

             _instance.select_node(_temp);

             location.hash = '#' + _temp;

             //showInstitutionByClickTree(_instance.get_type(_temp), _temp);

             $('#current_selected').text(_current_match);

         }

     });

     /*

      *   previous step for Tree

      */

     $('#pre_selected').on('click', function(){

         if(_node.size() === 0) return;

         var _instance = $('#area_setting_ou_tree').jstree(true);

         // selected node is not search results

         var _current_selected = null;

         if(!_node.find(_instance.get_selected()[0])) {

             _current_selected = _node.findLast();

             _current_match = _node.size();

             var _temp = _current_selected.element;

             _instance.deselect_all();

             _instance.select_node(_temp);

             location.hash = '#' + _temp;

             showInstitutionByClickTree(_instance.get_type(_temp), _temp);

             $('#current_selected').text(_current_match);

             return;

         }

         _current_selected = _node.find(_instance.get_selected()[0]);

         if(_current_selected.previous !=  _node.getHead()) {

             var _temp = _current_selected.previous.element;

             _instance.deselect_all();

             _instance.select_node(_temp);

             _current_match -= 1;

             $('#current_selected').text(_current_match);

         } else {

             //跳转到最后一个

             _current_selected = _node.findLast();

             _current_match = _node.size();

             var _temp = _current_selected.element;

             _instance.deselect_all();

             _instance.select_node(_temp);

             $('#current_selected').text(_current_match);

         }

     });

 });    

 function Node(element){

     this.element = element;

     this.next = null;

     this.previous = null;

 }

 function DoubleLinkedList(){

     this._head = new Node("This is Head Node.");

     this._size = 0;

 }

 DoubleLinkedList.prototype.getHead = function(){

     return this._head;

 };

 DoubleLinkedList.prototype.isEmpty = function(){

     return this._size === 0;

 };

 DoubleLinkedList.prototype.size = function(){

     return this._size;

 };

 DoubleLinkedList.prototype.findLast = function(){

     var currNode = this.getHead();

     while(currNode.next){

         currNode = currNode.next;

     }

     return currNode;

 };

 DoubleLinkedList.prototype.add = function(item){

     if(item == null)

         return null;

     this.insert(item);

 };

 DoubleLinkedList.prototype.remove = function(item){

     if(item) {

         var node = this.find(item);

         if(node == null)

             return ;

         if (node.next === null) {

             node.previous.next = null;

             node.previous = null;

         } else{

             node.previous.next = node.next;

             node.next.previous = node.previous;

             node.next = null;

             node.previous = null;

         }

         this._size--;

     }

 };

 DoubleLinkedList.prototype.find = function(item){

     if(item == null)

         return null;

     var currNode = this.getHead();

     while(currNode && currNode.element !== item){

         currNode = currNode.next;

     }

     return currNode;

 };

 DoubleLinkedList.prototype.insert = function(newElement, item){

     var newNode = new Node(newElement);

     var finder = item ? this.find(item) : null;

     if(!finder){

         var last = this.findLast();

         newNode.previous = last;

         last.next = newNode;

     }

     else{

         newNode.next = finder.next;

         newNode.previous = finder;

         finder.next.previous = newNode;

         finder.next = newNode;

     }

     this._size++;

 };

 DoubleLinkedList.prototype.dispReverse = function(){

     var currNode = this.findLast();

     while(currNode != this.getHead()){

         console.log(currNode.element);

         currNode = currNode.previous;

     }

 };

 DoubleLinkedList.prototype.display = function(){

     var currNode = this.getHead().next;

     while(currNode){

         console.log(currNode.element);

         currNode = currNode.next;

     }

 };