回答：etTimeout(function() {    var $report = $("div");    var $scroll = $report.find("#frozen-center");    var flag = window.flag0;     $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');     flag = true;    $scroll.mouseover(function() {        flag = false;    })     $scroll.mouseleave(function() {        flag = true;    })     var old = -1;    setInterval(function() {        if (flag) {            currentpos = $scroll.scrollTop;            if (currentpos == old) {                $scroll.scrollTop = 0;            } else {                old = currentpos;                $scroll.scrollTop = currentpos + 1.5;            }        }    }, 25);}, 500);