//獲取節點的位置
            var treeObj = $.fn.zTree.getZTreeObj("serviceTree");
            var nodes = treeObj.getSelectedNodes();
            if (nodes.length > 0) {
	             nodenum = treeObj.getNodeIndex(nodes[0]);
            }

var treeObj = $.fn.zTree.getZTreeObj("serviceTree");
            var nodes = treeObj.getSelectedNodes();
            //判斷選中的是否為子節點
            //若為父節點flag = true
            if(nodes.length > 0){
               var flag = nodes[0].isParent;
            }