$('#content').niceScroll({
    cursorcolor: "#ccc",//#CC0071 光标颜色
    cursoropacitymax: 1, //scrollabar“可见”状态，范围从1到0
    touchbehavior: false, //使光标拖动滚动像在台式电脑触摸设备
    cursorwidth: "5px", //像素光标的宽度
    cursorborder: "0", // 游标边框css定义
    cursorborderradius: "5px",//以像素为光标边界半径
    autohidemode: false //是否隐藏滚动条
});