setTimeout(function() {
    var $report = $("div[widgetname=REPORT0]");
    //获取对应report的div元素
    var $scroll = $report.find("#frozen-center");
    //获取对应report的div元素的滚动块元素,冻结为#frozen-center，未冻结且未安装自定义滚动条插件为.reportContent，未冻结且安装了自定义滚动条插件为.scrollDiv
    var flag = window.flag0;
    //设置全局变量flag,每个报表块需保证各不相同
    $report.find("#frozen-center").css('overflow-x', 'hidden');
    $report.find("#frozen-center").css('overflow-y', 'hidden');
    $report.find("#frozen-north").css('overflow-x', 'hidden');
    $report.find("#frozen-north").css('overflow-y', 'hidden');
    //冻结情况下隐藏滚动条
    $report.find(".reportContent").css('overflow-y', 'hidden');
    $report.find(".reportContent").css('overflow-x', 'hidden');
    //非冻结情况下隐藏滚动条
    flag = true;
    //定义全局参数flag，用来控制滚动的暂停和继续
    $scroll.mouseover(function() {
        flag = false;
    })

    //鼠标悬浮，滚动停止
    
    $scroll.mouseleave(function() {
        flag = true;
    })
    //鼠标离开，继续滚动
    var old = -1;
    
       
    setInterval(function() {
        if (flag) {
            currentpos = $scroll[0].scrollTop;
            //获取距顶部距离
            if (currentpos == old) {
                $scroll[0].scrollTop = 0;
                //若已到达底部，则重置
            } else {

                old = currentpos;
                $scroll[0].scrollTop = currentpos + 1;
                //若未到达底部，则向下移动1像素
                $report.find("#frozen-center tbody tr").each(function() {
                    // FR.Msg.toast($(this).index())
                    // alert($(this).index()+1)
                
                if($scroll[0].scrollTop<15){
                                  if (this.id !== 'r-0-0'&&this.id!='r-1-0'&& parseInt(($scroll[0].scrollTop+30)/30/($(this).index()+1))==($(this).index()+1)) {
                
                                        $(this).children("td").each(function() {
                                        // $(this).css("color",'red');
                                        $(this).css({"font-weight":'bold',"color":'red'})
                                        this.style.fontSize='13px'
                                    })}
                                            
                                    }
                                    else{
            

                                        if ( this.id !== 'r-0-0'&&this.id!='r-1-0'&& parseInt(($scroll[0].scrollTop)/30)==$(this).index()) {
                
                                            $(this).children("td").each(function() {
                                            // $(this).css("color",'red')
                                           $(this).css({"font-weight":'bold',"color":'red'})
                                           this.style.fontSize='13px'

                                        })}
                                    
                                        }
                                    });
                    }
        }
    }, 80);
    //以25ms的频率执行
}, 1000);

测试结果，字体不宜调太大，不然就不滚动了。你可以优化一下。

滚动报表测试.frm