.dumascroll {}/*只需对需要渲染滚动条的div设置该class即可*/
.dumascroll_area { height:100%; overflow:hidden; }
.dumascroll_bar { position:absolute; top:0; right:0; z-index:7; width:8px; height:100%; cursor:default; background:#141414; border-left:#7d7e81 solid 1px; float:left; }
.dumascroll_handle, .dumascroll_handle_a { width:8px; background:#7d7e81; }
.dumascroll_handle_a { background:#919191; }
.dumascroll_arrow_up, .dumascroll_arrow_up_a, .dumascroll_handle, .dumascroll_handle_a, .dumascroll_arrow_down, .dumascroll_arrow_down_a { position:absolute; left:0; }
.dumascroll_arrow_up, .dumascroll_arrow_up_a, .dumascroll_arrow_down, .dumascroll_arrow_down_a { height:0px; border:0; }