javascript layui-box layui-code-view" style="margin-top: 0px; margin-bottom: 10px; padding: 9.5px; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); white-space: pre-wrap; overflow-wrap: break-word; box-sizing: border-box; position: relative; font-size: 13px; border: 1px solid rgb(204, 204, 204); background-color: rgb(245, 245, 245); color: rgb(51, 51, 51); font-family: Menlo, Monaco, Consolas, "Courier New", monospace; overflow: auto; line-height: 1.42857; word-break: break-all; border-radius: 4px;">
code
var sh,wh3,nowlocal;
    $(window).scroll(function(){
            //鼠标转动的时辰获得转动条的间隔页面底部的间隔
        sh = $(window).scrollTop();
        //获得屏幕高度的三分一
        wh3 = $(window).height()/3;
        //转动条的高度+屏幕上边三分之一的间隔=当前的div一向在屏幕间隔窗口上边的位置
        nowlocal = sh + wh3;
        //设备间隔，转动时会有先上去再下来到本来位置的结果
        $('.rbar').animate({top:nowlocal},50);
        if(sh>500){
            $('.rbar ul').fadeIn();
        }else{
            $('.rbar ul').fadeOut();
        }
    });