js 计时器简单实现

js 计时器简单实现

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var timeCount = 0；
var examTimer = setInterval(function () {
		timeCount++;
		var m = parseInt(timeCount / 60);
		var s = parseInt(timeCount % 60);
		$("#span-time").html(toDub(m) + ":" + toDub(s));
		
	}, 1000);

function toDub(n) {
			return n < 10 ? "0" + n : "" + n;
		}