var str = realFormatSecond(e.target.currentTime
);
console.log(e.target.scrollTop); //1255256252
console.log( str ); // 05:31
function realFormatSecond(second) {
var secondType = typeof second;
if (secondType === "number" || secondType === "string") {
second = parseInt(second);
var mimute = Math.floor(second / 60);
second = second - mimute * 60;
return ("0" + mimute).slice(-2) + ":" + ("0" + second).slice(-2);
} else {
return "00:00";
}
}