public JKUserTree(int jkNum){
		this.jkNum=jkNum;
		root=new DefaultMutableTreeNode("ҵĺ");
	   DefaultTreeModel tm=new DefaultTreeModel(root);
		this.setModel(tm);
		//Mouse¼˫ûϢ
		this.addMouseListener(new java.awt.event.MouseAdapter(){
			public void mouseClicked(MouseEvent e) {
				if(e.getClickCount()==2){//˫¼
				showSendFrame();//Ϣ
				}
			}
		});
	}