js操作页面滚动条，开启禁用右键菜单

 //隐藏滚动条
        document.body.style.overflow = "hidden";

//显示页面滚动条

        document.body.style.overflow = "auto";

  function Stop() { return false; }

    function Start() { return true; }

//开启鼠标右键

        document.oncontextmenu = Start;

    //禁用鼠标右键

       // document.oncontextmenu = Stop;