jstree节点展开设置

$(function () {
                $("#demo1").bind("loaded.jstree", function (e, data) {
                    data.inst.open_all(-1); // -1 打开所有节点
                }).jstree()
            .delegate("a", "click", function (event, data) {
                event.preventDefault();
                window.location.href = $(this).attr("href");
            })
            });