$("#SDID").combotree({

            url: '/Ajax/GetDeptTree.aspx?level=4&pid=-1',

            onSelect: function (node) {

                //if (record.attributes.nodetype != 4) {

                //    return false;

                //}

                //返回树对象

                var tree = $(this).tree;

                //选中的节点是否为叶子节点,如果不是叶子节点,清除选中

                var isLeaf = tree('isLeaf', node.target);

                if (!isLeaf) {

                    //清除选中

                    $('#SDID').combotree('clear');

                }

            },

            onLoadSuccess: function (node, data) {

            }

        });