ztree展开节点信息存cookie，刷新自动显示之前展开信息

    var callbackClick = function (event, treeId, treeNode) {
        var tree = $.fn.zTree.getZTreeObj(treeId);
        mainFrame.execute(tree, event, treeId, treeNode);
        tree.expandNode(treeNode, true, false, true);
        var cls;
        if (treeNode.orgLevel && treeNode.orgLevel != 2) {
            return;
        }
        if (treeNode.isParent == 0) {
            return;
        }
    };


    //树形初始化与点击事件
    var treeLoadFlags = [false, false, false, false, false];
    var currTree;
    $(document).ready(function () {
        var trees = [];
        var type = [[${type}]];
        var typeurl = type == 'mpg' ? '&type=mpg' : '';
        for (var i = 0; i < plans.length; i++) {
            var tab = plans[i].tab;
            trees[trees.length] = new AsyncTree("/guidance/plan/asyncTree?planId=" + tab + typeurl, "#tree" + tab);
            trees[i].setting.callback = {
                onClick: callbackClick,
                onExpand: zTreeBeforeExpand,
                onCollapse: zTreeBeforeCollapse,
                //用于捕获异步加载出现异常错误的事件回调函数
                onAsyncError: onAsyncError,
                //用于捕获异步加载正常结束的事件回调函数
                onAsyncSuccess: onAsyncSuccess,
                onCheck: zTreeOnCheck
            };
            trees[i].setting.check = {
                enable: [[${checked=='true'}]]
            };
            $('#tabBtn' + tab).click(function () {
                var ti = this.value;
                if (!treeLoadFlags[ti]) {
                    trees[ti].loadTree();
                    treeLoadFlags[ti] = true;
                }
                currTree = trees[ti];
            });
        }
        currTree = trees[0];
        trees[0].loadTree();//加载第一颗树

    });

    /**
     返回当前页签树选中的节点。
     **/
    function getCurrTreeCheckedNodes() {
        var nodes = currTree.tree.getCheckedNodes(true);
        return nodes;
    }

    function getCurrTreeSelectNodes() {
        var nodes = currTree.tree.getSelectedNodes(true);
        return nodes;
    }

    var zTreeBeforeExpand = function (event, treeId, treeNode) {
        // 树展开
        var cookie = $.cookie(treeId + window.location);
        var z_tree = new Array();
        if (cookie) {
            z_tree = JSON.parse(cookie);
            //console.log(z_tree);
        }
        if ($.inArray(treeNode.id, z_tree) < 0) {
            z_tree.push(treeNode.id);
        }
        $.cookie(treeId + window.location, JSON.stringify(z_tree));
    };
    var zTreeBeforeCollapse = function (event, treeId, treeNode) {
        var cookie = $.cookie(treeId + window.location);
        var z_tree = new Array();
        if (cookie) {
            z_tree = JSON.parse(cookie);
        }
        //判断treeNode 在z_tree中的索引
        var index = $.inArray(treeNode.id, z_tree);
        //删除
        z_tree.splice(index, 1);

        for (var i = 0; i < treeNode.children.length; i++) {
            index = $.inArray(treeNode.children[i].id, z_tree);
            if (index > -1) {
                z_tree.splice(index, 1);
            }
        }
        $.cookie(treeId + window.location, JSON.stringify(z_tree));
    };

    function onAsyncSuccess(event, treeId, treeNode, msg) {
        var treeChecked = treeId+'checked';
        var tree = $.fn.zTree.getZTreeObj(treeId);
        //alert(treeId + "haha");
        var z_tree = new Array();
        var z_tree_select = new Array();
        var msgNode = new Array();
        if (msg != null) {
            var json = JSON.parse(msg);
            for (var i = 0; i < json.length; i++) {
                msgNode.unshift(json[i].id);
            }
        }
        var cookie = $.cookie(treeId + window.location);
        var cookieSelect = $.cookie(treeChecked + window.location);
        if (cookie) {
            z_tree = JSON.parse(cookie);
            if(typeof (cookieSelect) !== "undefined"){
                z_tree_select = JSON.parse(cookieSelect);
            }

            //2.首先判断根节点是否存在
            if (msgNode.length > 0) {
                for (var j = 0; j < msgNode.length; j++) {
                    var index = $.inArray(msgNode[j], z_tree);
                    var indexchecked = $.inArray(msgNode[j], z_tree_select);
                    //console.log(msgNode[j])
                    if (index != -1) {
                        //3.把跟节点展开
                        //var node1 = tree.getNodeByTId(msgNode[j]);
                        var node = tree.getNodeByParam("id", msgNode[j], null);
                        tree.expandNode(node, true, false, true);
                    }
                    if (indexchecked != -1) {
                        //3.把跟节点展开
                        //var node1 = tree.getNodeByTId(msgNode[j]);
                        var nodechecked = tree.getNodeByParam("id", msgNode[j], null);
                        tree.checkNode(nodechecked, true, true,false);
                        //tree.expandNode(node, true, false, true);
                    }

                }
            }
        }

        if (cookieSelect) {
            z_tree_select = JSON.parse(cookieSelect);
            //2.首先判断根节点是否存在
            if (msgNode.length > 0) {
                for (var k = 0; k < msgNode.length; k++) {
                    var index = $.inArray(msgNode[k], z_tree_select);
                    //console.log(msgNode[j])
                    if (index != -1) {
                        //3.把跟节点展开
                        //var node1 = tree.getNodeByTId(msgNode[j]);
                        var node = tree.getNodeByParam("id", msgNode[k], null);
                        tree.checkNode(node, true, true,false);
                        //tree.expandNode(node, true, false, true);
                    }
                }
            }
        }


    }

    function onAsyncError(event, treeId, treeNode, XMLHttpRequest, textStatus, errorThrown) {
        alert(XMLHttpRequest);
    }
    function zTreeOnCheck(event, treeId, treeNode) {
        var treeChecked = treeId+'checked';
        var nodes = getCurrTreeCheckedNodes();
        var z_tree_select = new Array();
        for(var i = 0; i < nodes.length; i++){
            var node = nodes[i];
            z_tree_select.push(node.id);
        }
        $.cookie(treeChecked+ window.location, JSON.stringify(z_tree_select));

        //alert(treeNode.tId + ", " + treeNode.name + "," + treeNode.checked);
    }