处理js两个数相乘的坑

//两个浮点数相乘的计算方法
function accMul(arg1, arg2) {
???var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
???try { m += s1.split(".")[1].length } catch (e) { }
???try { m += s2.split(".")[1].length } catch (e) { }
???return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m)
}