纯数字逐一停止显示效果

function showScore($ele, num, secand, pause){ //second  按照秒数，动画运行多少秒
if (!secand) { secand = 2;}
if (!pause) { pause = 20;}

var len = String(num).length;

var temnum, times = 0 , stepTimes, max ;
var numArr = String(num).split("");

function getRandom(n){
var num = Math.floor(Math.random()*(Math.pow(10, n)-1 - Math.pow(10, n-1))+Math.pow(10, n-1));

if (String(num).length !== n) {num = getRandom(n);}

return num;
}

function setValue(num, pause, secand){//second 运行多少秒后停止
var len = String(num).length, j=0;

if (!stepTimes) {
max = Math.ceil(secand*1000/len);
stepTimes = Math.ceil(max/pause);
}

temnum = "";
setTimeout(function(){
for (var i = 1; i <= len; i++) {
if (times >= stepTimes*i) {
j++;
temnum += numArr[i-1]+"";
}else{
break;
}
};

if (j < len) {
$ele.html(temnum+""+getRandom(len-j));
}else{
$ele.html(temnum);
}

if (times >= max || j >= len) {return;};

setValue(num, pause, secand);
times++;

}, pause);

}

setValue(num, pause, secand);

}

showScore($(".num"), 2344, 1.5, 10);