EasyUI 加载Tree

function LoadTree(result) {
   
    mainMenu = $('#mainMenu').tree({
        url: "/ajax/GetTreeJson.ashx",
        parentField: 'pid',
        animate: true,
        onLoadError: function () {
            $.messager.alert('提示', '加载失败，请重试', 'error');
        },
        onLoadSuccess: function (node, data) {
            SetSetting(result);
            // mainMenu.tree('collapseAll');

        },
        onClick: function (node) {
            if (node.attributes.url) {
                var tabs = $('#worktab');
                var src = node.attributes.url + "&NowDateTimeSign =" + Math.random();
                var isreloadid = node.attributes.isreloadid;
                var opts = {
                    title: node.text,
                    closable: true,
                    iconCls: node.iconCls,
                    content: '<iframe id="ifm_frame" src="' + src + '" allowTransparency="true" style="border:0;width:100%;height:99%;" frameBorder="0"></iframe>',
                    border: false,
                    fit: true,
                    id: isreloadid//暂时将是否重新刷新页面放在ID上
                };
                if (tabs.tabs('exists', opts.title)) {
                    tabs.tabs('select', opts.title);
                    //判断是否重新加载数据
                    if (isreloadid == "2") {
                        var tab = tabs.tabs('getSelected');
                        tabs.tabs('update', {
                            tab: tab,
                            options: {
                                title: opts.title,
                                content: opts.content
                            }
                        });
                    }

                } else {
                    tabs.tabs('add', opts);
                    tabClose();
                    tabCloseEven();

                }
            }
            else {
                if (node.state=='closed')
                {
                    mainMenu.tree("expand", node.target);
                }
                else {
                    mainMenu.tree("collapse", node.target);
                }
            }
        }
    });


    $("#worktab").tabs({
        onSelect: function (title, index) {
            var target = this;
            var pp = $(target).tabs('getSelected');
            var tab = pp.panel('options');
            if (tab.id == "2") {
                $(target).tabs('update', {
                    tab: pp,
                    options: {
                        title: tab.title,
                        content: tab.content
                    }
                });
            }
        }
    });
}