NGUI 检测鼠标点击事件，登陆的样本

    //获取账号input里面的label
    public UILabel ZhangHao;
    
    //获取密码input里面的label
    public UILabel MiMa;
    
    //获获取父级位置
    public Transform MianTrasfrom;
        
        //鼠标点击之后的触发事件
	void OnClick()
        {
            if (ZhangHao.text=="admin" && MiMa.text=="admin")
            {
                //验证成功后加载场景
                Application.LoadLevel(2);
            } 
            else
            {
                //失败后弹出预设
                Debug.Log("账号密码错误！");

                GameObject go = (GameObject)Instantiate(Resources.Load("NameError"), MianTrasfrom.position, MianTrasfrom.rotation);
                go.transform.parent = MianTrasfrom;
            }
            
    }