添加数字逗号.js

/**
 * Created by xiedonghao on 16/2/16.
 */
/*
 * 添加数字逗号
 * addCommas(123456) // 123,456
 */
function addCommas(nStr)
{
    nStr += '';
    var x = nStr.split('.');
    var x1 = x[0];
    var x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }
    return x1 + x2;
}