常用的JS验证和函数汇总

下面是我常用一些JS验证和函数，有一些验证我直接写到了对象的属性里面了，可以直接通过对象.方法来调用

//浮点数除法运算

function fdiv(a, b, n) {

    if (n == undefined) { n = 2; }

    var t1 = 0, t2 = 0, r1, r2;

    try { t1 = a.toString().split(".")[1].length } catch (e) { }

    try { t2 = b.toString().split(".")[1].length } catch (e) { }

    with (Math) {

        r1 = Number(a.toString().replace(".", ""));

        r2 = Number(b.toString().replace(".", ""));

        return ((r1 / r2) * pow(10, t2 - t1)).toFixed(n);

    }

}

//浮点数乘法运算

function fmul(a, b, n) {

    if (n == undefined) { n = 2; }

    var m = 0, s1 = a.toString(), s2 = b.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)).toFixed(n);

}

//浮点数加法运算

function fadd(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2))

    return ((a * m + b * m) / m).toFixed(n);

}

//浮点数减法运算

function fsub(a, b, n) {

    if (n == undefined) { n = 2; }

    var r1, r2, m;

    try { r1 = a.toString().split(".")[1].length } catch (e) { r1 = 0 }

    try { r2 = b.toString().split(".")[1].length } catch (e) { r2 = 0 }

    m = Math.pow(10, Math.max(r1, r2));

    //动态控制精度长度

    //n = (r1 >= r2) ? r1 : r2;

    return ((a * m - b * m) / m).toFixed(n);

}

Number.prototype.add = function (arg) {

    return fadd(this, arg);

}

Number.prototype.subs = function (arg) {

    return fsub(this, arg);

}

Number.prototype.mul = function (arg) {

    return fmul(this, arg);

}

Number.prototype.div = function (arg) {

    return fdiv(this, arg);

}

///格式化数字位数，不足位数默认左边补0,如果指定了参数2并且参数2的值为1则右边补0

Number.prototype.FormatLen = function (len, direct) {

    var d = parseInt(direct);

    if (isNaN(d)) { d = 0; }

    var num = this.toString();

    if (num.length < len) {

        for (var i = num.length; i < len; i++) {

            if (d == 0) {

                num = "0" + num;

            }

            else {

                num += "0";

            }

        }

    }

    return num;

}

//格式化小数点数位,可以指定小数位数,是否四舍五入等参数

Number.prototype.FormatRadix = function (len, IsRound) {

    var num = this.toString();

    var numArr = num.split('.');

    var rad = 0;

    var numpart = parseInt(numArr[0]);

    if (numArr.length >= 2) {

        if (numArr[1].length < len) {

            rad = parseInt(numArr[1]).FormatLen(len, 1);

        }

        else {

            if (numArr[1].length == len) {

                rad = numArr[1];

            }

            else {

                rad = numArr[1].substr(0, len);

                if (IsRound) {

                    var d = parseInt(numArr[1].substr(len, 1));

                    if (d >= 5) { rad += 1; if (rad.toString().length > len) { numpart += 1; rad = rad.toString().substr(1, len); } }

                }

            }
        }

    }

    else {

        rad = rad.FormatLen(len);

    }

    return numpart + "." + rad;

}

//检测字符串中是否有相同的元素split是字符串分隔符，如果指定了分隔符，则判断分隔符为分隔的字符串是否有重复，如果没指定则判断单个字符串是否有重复

//有重复返回true

String.prototype.CompareElement = function (s) {

    var str = this.toString();

    if (s == undefined) {

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

            for (j = i + 1; j < str.length; j++) {

                if (str.substr(i, 1) == str.substr(j, 1)) {

                    return true;

                }

            }

        }

    }

    else {

        var strArr = str.split(s);

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

            for (var j = i + 1; j < strArr.length; j++) {

                if (strArr[i] == strArr[j]) {

                    return true;

                }

            }

        }

    }

    return false;

}

String.prototype.replaceAll = function (str, tostr) {

    oStr = this;

    while (oStr.indexOf(str) > -1) {

        oStr = oStr.replace(str, tostr);

    }

    return oStr;

}

Array.prototype.CompareElement = function () {

    var strArr = this;

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

        for (var j = i + 1; j < strArr.length; j++) {

            if (strArr[i] == strArr[j]) {

                return true;

            }

        }

    }

    return false;

}

//字符串转组数,如果未指定分隔符s,则默认以,分隔分隔符,如果指定分隔符为空则将每个字符作为一个数组元素

String.prototype.ToArray = function (s) {

    if (s == undefined) { s = ","; }

    var strArr = [];

    strArr = this.split(s);

    return strArr;

}

//将一个数组转换一个字符串，所有元素使用指定的分隔符连接，默认分隔为,

Array.prototype.ToIDList = function (s) {

    if (s == undefined) { s = ","; }

    var list = "";

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

        list += (list == "" ? this[i] : s + "" + this[i]);

    }

    return list;

}

//获取指定元素的位置索引,元素不存在返回-1

Array.prototype.GetIndex = function (s) {

    var index = -1;

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

        if ((s + "") == this[i]) {

            index = i;

        }

    }

    return index;

}

//将指定元素从数组中删除

Array.prototype.Remove = function (s) {

    var list = "";

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

        if (s != this[i]) {

            list += (list == "" ? this[i] : "," + this[i]);

        }

    }

    return list.ToArray();

}

///将数组进行数字排序asc指定是否进行升序排序，可以为true或者false，未指定为升序

Array.prototype.SortByNumber = function (asc) {

    if (asc == undefined) { asc = true; }

    if (asc) {

        return this.sort(SortNumberAsc);

    }

    else {

        return this.sort(SortNumberDesc);

    }

}

Array.prototype.InArray = function (e) {

    var IsIn = false;

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

        if (this[i] == (e + "")) {

            IsIn = true;

        }

    }

    return IsIn;

}

String.prototype.Trim = function (s) { return Trim(this, s); }

String.prototype.LTrim = function (s) { return LTrim(this, s); }

String.prototype.RTrim = function (s) { return RTrim(this, s); }

//配合Array.SortByNumer使用，将数字进行数组降序排序

function SortNumberDesc(a, b) {

    return b - a;

}

//配合Array.SortByNumer使用，将数字进行数组升序排序

function SortNumberAsc(a, b) {

    return a - b;

}

//此处为独立函数

function LTrim(str, s) {

    if (s == undefined) { s = " "; }

    if (str == s && s != " ") { return s; }

    var i;

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

        if (str.charAt(i) != s && str.charAt(i) != s) break;

    }

    str = str.substring(i, str.length);

    return str;

}

function RTrim(str, s) {

    var i;

    if (str == s && s != " ") { return s; }

    if (s == undefined) { s = " "; }

    for (i = str.length - 1; i >= 0; i--) {

        if (str.charAt(i) != s && str.charAt(i) != s) break;

    }

    str = str.substring(0, i + 1);

    return str;

}

function Trim(str, s) {

    return LTrim(RTrim(str, s), s);

}

///检测字符串是否是由中文,英文,数字以及下划线组成的

function chkNickName(str) {

    var pattern = /^[\w\u4e00-\u9fa5]+$/gi;

    if (pattern.test(str)) {

        return true;

    }

    return false;

}

//判断长度(长度不限为0)

String.prototype.IsLen = function () {

    var isRightFormat = false;

    var minnum = arguments[0] ? arguments[0] : 0;

    var maxnum = arguments[1] ? arguments[1] : 0;

    isRightFormat = (minnum == 0 && maxnum == 0 ? true : (calculate_byte(this) >= minnum && calculate_byte(this) <= maxnum ? true : false));

    return isRightFormat;

}

//验证字符串是否为字母+数字+_+-

String.prototype.IsStr = function () {

    var myReg = /^[0-9a-zA-Z\-\_]+$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证用户名

String.prototype.IsUsername = function () {

    var myReg = /^[0-9a-zA-Z\-\_]{3,50}$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证密码

String.prototype.IsPassword = function () {

    var myReg = /^[0-9a-zA-Z`~!@#$%^&*()-_+=\{\}\[\]\;\:\"\'\?\/\\]{6,}$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证是否为字母

String.prototype.IsEn = function () {

    var myReg = /^[a-zA-Z]+$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证是否为汉字

String.prototype.IsCn = function () {

    var myReg = /^[\u0391-\uFFE5]+$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证E-mail

String.prototype.IsEmail = function () {

    var myReg = /([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)/;

    if (myReg.test(this)) return true;

    return false;

}

//验证MSN

String.prototype.IsMSN = function () {

    var myReg = /([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)/;

    if (myReg.test(this)) return true;

    return false;

}

//验证QQ号码

String.prototype.IsQQ = function () {

    var myReg = /^[1-9]\d{4,10}$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证网址

String.prototype.IsHttpUrl = function () {

    var myReg = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证域名

String.prototype.IsDoMainName = function () {

    var myReg = /^[0-9a-zA-Z]([0-9a-zA-Z\-]+\.){1,3}[a-zA-Z]{2,4}?$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证IPV4地址

String.prototype.IsIpv4 = function () {

    var myReg = /^(2[0-5]{2}|1?[0-9]{1,2}).(2[0-5]{2}|1?[0-9]{1,2}).(2[0-5]{2}|1?[0-9]{1,2}).(2[0-5]{2}|1?[0-9]{1,2})$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证图片地址(不支持由CGI动态生成的图片)

String.prototype.IsImgURL = function () {

    var myReg = /^\.(jpeg|jpg|gif|bmp|png|pcx|tiff|tga|lwf)$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证手机号码

String.prototype.IsCellPhone = function () {

    var myReg = /^((\(\d{3}\))|(\d{3}\-))?1[3,5]\d{9}$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证固定电话

String.prototype.IsPhone = function () {

    var myReg = /^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证邮编

String.prototype.IsZipCode = function () {

    var myReg = /[0-9]{6}/;

    if (myReg.test(this)) return true;

    return false;

}

//验证身份证号码

String.prototype.IsIdCard = function () {

    var myReg = /(^([\d]{15}|[\d]{18}|[\d]{17}[xX]{1})$)/;

    if (myReg.test(this)) return true;

    return false;

}

//验证日期格式YY-MM-DD

String.prototype.IsDateFormat = function () {

    var myReg = /^[0-9]{4}-[0-9]{1,2}-[0-9]{1,2}$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证时间格式HH:MM:SS

String.prototype.IsRangeTime = function () {

    var myReg = /^(\d{2}):(\d{2}):(\d{2})$/;

    if (myReg.test(this)) return true;

    return false;

}

//验证金额格式

String.prototype.IsMoney = function () {

    var myReg = /^[0-9]{1,8}[.]{0,1}[0-9]{0,6}$/;

    if (myReg.test(this)) return true;

    return false;

}

//字验证数字格式并判断数字的围(min:最小值;max:最大值.)

String.prototype.IsInt = function () {

    var isRightFormat = false;

    var minnum = arguments[0] ? arguments[0] : 0;

    var maxnum = arguments[1] ? arguments[1] : 0;

    var myReg = /^[-\+]?\d+$/;

    if (myReg.test(this)) {

        isRightFormat = (minnum == 0 && maxnum == 0 ? true : (this > minnum && this < maxnum ? true : false));

    }

    return isRightFormat;

}

//验证搜索关键字

String.prototype.IsSearch = function () {

    var myReg = /^[\|\"\'<>,.*&@#$;:!^()]/;

    if (myReg.test(this)) return false;

    return true;

}

//js准确计算字符串长度

function calculate_byte(sTargetStr) {

    var sTmpStr, sTmpChar;

    var nOriginLen = 0;

    var nStrLength = 0;
    sTmpStr = new String(sTargetStr);

    nOriginLen = sTmpStr.length;
    for (var i = 0; i < nOriginLen; i++) {

        sTmpChar = sTmpStr.charAt(i);
        if (escape(sTmpChar).length > 4) {

            nStrLength += 2;

        } else if (sTmpChar != '\r') {

            nStrLength++;

        }

    }
    return nStrLength;

}

//颜色值;

String.prototype.IsColor = function () {

    var s = arguments[0] ? arguments[0] : "";

    s = s.Trim();

    if (s.length != 7) return false;

    return s.search(/\#[a-fA-F0-9]{6}/) != -1;

}

//js日期格式化

Date.prototype.format = function (format) {

    var o = {

        "M+": this.getMonth() + 1, //month 

        "d+": this.getDate(), //day 

        "h+": this.getHours(), //hour 

        "m+": this.getMinutes(), //minute 

        "s+": this.getSeconds(), //second 

        "q+": Math.floor((this.getMonth() + 3) / 3), //quarter 

        "S": this.getMilliseconds() //millisecond 

    }
    if (/(y+)/.test(format)) {

        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));

    }
    for (var k in o) {

        if (new RegExp("(" + k + ")").test(format)) {

            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));

        }

    }

    return format;

}
function HasChinese(value) {

    if (/^[\u4e00-\u9fa5]+$/.test(value)) {

        return true;

    }

    return false;

}
function ToDate(dateStr) {

    var dStr = dateStr.toString();

    dateStr = dStr.replaceAll("-", "/");
    return new Date(Date.parse(dateStr));

}

//是否ID列表

String.prototype.IsIdList = function (s) {

    if (s == undefined) {

        s = ",";

    }

    var arr = this.split(s);

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

        if (isNaN(parseInt(arr[i]))) { return false; }

    }

    return true;

}

//获取事件触发的对象

function getEventTarget(e) {

    e = e || window.event;

    return e.target || e.srcElement;

} 

代码都很简洁，简单，功能却都很实用，有需要的小伙伴参考下