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::-webkit-scrollbar{width:12px; height:12px;} /*滚动条垂直方向与水平方向的宽度*/
::-webkit-scrollbar-track-piece:vertical{background:url(https://images.cnblogs.com/cnblogs_com/gumgum/439468/r_bg_scroll.png) repeat-y 50%;}
::-webkit-scrollbar-track-piece:horizontal{background:url(https://images.cnblogs.com/cnblogs_com/gumgum/439468/r_bg_scroll.png) repeat-x 50%;}
::-webkit-scrollbar-thumb{background:url(https://images.cnblogs.com/cnblogs_com/gumgum/439468/t_bg_scroll_btn.png) no-repeat center;} /*滚动条轨道上的按钮*/
::-webkit-scrollbar-thumb:hover{background:url(https://images.cnblogs.com/cnblogs_com/gumgum/439468/t_bg_scroll_btnhover.png) no-repeat center;}
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