/**

 * 金额格式化

 * @param s

 * @param n

 * @returns {String}

 */

function fmoney(s, n) {

    n = n > 0 && n <= 20 ? n : 2;

    s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";

    var l = s.split(".")[0].split("").reverse(), r = s.split(".")[1];

    t = "";

    for (i = 0; i < l.length; i++) {

        t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");

    }

    return t.split("").reverse().join("") + "." + r;

}

/**

 * 只能输入数字和小数点

 * @param obj

 */

function clearNoNum(obj) {

    obj.value = obj.value.replace(/[^\d.]/g, ""); //清除“数字”和“.”以外的字符

    obj.value = obj.value.replace(/^\./g, ""); //验证第一个字符是数字而不是.

    obj.value = obj.value.replace(/\.{2,}/g, "."); //只保留第一个. 清除多余的.

    obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3'); //只能输入两个小数

    obj.value = obj.value.replace(".", "$#$").replace(/\./g, "").replace("$#$",".");

}

//匹配金额并且格式化

function matchMoney(obj) {

    var stmp = "";

    if (obj.value == stmp) {

        return;

    } else if (obj.value == ".") {

        obj.value = "";

        return;

    }

    var ms = obj.value.replace(/[^\d\.]/g, "").replace(/(\.\d{2}).+$/, "$1").replace(/^0+([1-9])/, "$1").replace(/^0+$/, "0");

    var txt = ms.split(".");

    while (/\d{4}(,|$)/.test(txt[0]))txt[0] = txt[0].replace(/(\d)(\d{3}(,|$))/, "$1,$2");

    obj.value = stmp = txt[0] + (txt.length > 1 ? "." + txt[1] : "");

}