金额转千分位

/**
 * 金额转千分位
 * @param price
 * @returns string
 */
function toThousands(price)
{
    var  digit =  2;//保留小数位数
    price = parseFloat((price + "").replace(/[^\d\.-]/g, "")).toFixed(digit) + "";
    var leftPart = price.split(".")[0].split("").reverse();//左侧
    var rightPart = price.split(".")[1];//右侧
    var thousandsResult = "";
    for(var i = 0; i < leftPart.length; i ++ )
    {
        thousandsResult += leftPart[i] + ((i + 1) % 3 == 0 && (i + 1) != leftPart.length ? "," : "");//千分标识
    }
    return thousandsResult.split("").reverse().join("") + "." + rightPart; //拼接
}