复制代码 代码如下:

function addCommas(nStr)

{

nStr += '';

x = nStr.split('.');

x1 = x[0];

x2 = x.length > 1 ? '.' + x[1] : '';

var rgx = /(d+)(d{3})/;

while (rgx.test(x1)) {

x1 = x1.replace(rgx, '$1' + ',' + '$2');

}

return x1 + x2;

}

//数字格式化就可以变成

var num = 123456.4231;

num = num.toFixed(2);

num =addCommas(num);

// num = 123456.42