js常用自定义公共函数汇总

本文整理了一些js常用自定义公共函数如检查是否是日期格式、判断输入的字符是否为中文、判断是否为空、固定电话、手机号码等等

代码如下:

String.prototype.trim = function(){

return this.replace(/(^s*)|(s*$)/g, "");

}

//检查是否是日期格式

function isDate(datestr){

var result = datestr.match(/((^((1[8-9]d{2})|([2-9]d{3}))(-)(10|12|0?[13578])(-)(3[01]|[12][0-9]|0?[1-9])$)|(^((1[8-9]d{2})|([2-9]d{3}))(-)(11|0?[469])(-)(30|[12][0-9]|0?[1-9])$)|(^((1[8-9]d{2})|([2-9]d{3}))(-)(0?2)(-)(2[0-8]|1[0-9]|0?[1-9])$)|(^([2468][048]00)(-)(0?2)(-)(29)$)|(^([3579][26]00)(-)(0?2)(-)(29)$)|(^([1][89][0][48])(-)(0?2)(-)(29)$)|(^([2-9][0-9][0][48])(-)(0?2)(-)(29)$)|(^([1][89][2468][048])(-)(0?2)(-)(29)$)|(^([2-9][0-9][2468][048])(-)(0?2)(-)(29)$)|(^([1][89][13579][26])(-)(0?2)(-)(29)$)|(^([2-9][0-9][13579][26])(-)(0?2)(-)(29)$))/);

if(result==null){

return "no";

}

return "yes";

}

//此方法以上面效果一致

function isDate2(datestr) {

var result = datestr.match(/^(d{1,4})(-|/)(d{1,2})2(d{1,2})$/);

if (result == null)

return "no";

var d = new Date(result[1], result[3] - 1, result[4]);

if((d.getFullYear() == result[1] && (d.getMonth() + 1) == result[3] && d.getDate() == result[4])){

return "yes";

}

return "no";

}

//判断输入的字符是否为中文

function IsChinese(str){

if(str.length!=0){

reg=/^[u0391-uFFE5]+$/;

if(!reg.test(str)){

// alert("对不起,您输入的字符串类型格式不正确!");

return "no";

}

}

return "yes";

}

//判断是否为空

function isEmpty(str){

if(str==null||typeof str=="undefined"||str.trim()==""){

return true;

}else{

return false;

}

}

//固定电话

function testTelephone(phone){

var phone_reg = new RegExp(/^([+]{0,1}d{3,4}|d{3,4}-)?d{7,8}$/);

if(!phone_reg.test(phone)){

return "no";

}

return "yes";

}

//折扣

function isDiscount(discount){

var phone_reg = new RegExp(/^(0([.]d{1,2})|1|1.00|1.0)$/);

if(!phone_reg.test(discount)){

return "no";

}

return "yes";

}

//手机号码

function testMobile(mobile){

var mobile_reg = new RegExp(/^0{0,1}1[0-9]{10}$/);

if(!mobile_reg.test(mobile)){

return "no";

}

return "yes";

}

//QQ号码从10000开始

function testQQ(qq){

var qq_reg = new RegExp(/^[1-9][0-9]{4,}$/);

if(!qq_reg.test(qq)){

return "no";

}

return "yes";

}

//电子邮件

function testEmail(email){

var email_reg = new RegExp(/^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/);

if(!email_reg.test(email)){

return "no";

}

return "yes";

}

//不带符号的正整数

function testPlusDigit(digit){

var plusDigit_reg = new RegExp(/^d+$/);

if(!plusDigit_reg.test(digit)){

return "no";

}

return "yes";

}

//DOUBLE价格

function testPriceFormat(str){

var priceFormatReg = new RegExp(/^d+(.d{1,2})?$/);

if(!priceFormatReg.test(str)){

return "no";

}

return "yes";

}

//身份证

function testIDCard(str){

var IDCardReg = new RegExp(/(^d{15}$)|(^d{17}([0-9]|X)$)/);

if(!IDCardReg.test(str)){

return "no";

}

return "yes";

}

//2012-06-19日期格式

function testDate(str){

var dateReg = new RegExp(/(^d{4}-[0,1][0-9]-[0-3][0-9]$)/);

if(!dateReg.test(str)){

return "no";

}

return "yes";

}

//浮点数精确运算(加法)

function accAdd(arg1,arg2){

var r1,r2,m,n;

try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}

try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}

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

n=(r1>=r2)?r1:r2;

return ((arg1*m+arg2*m)/m).toFixed(n);

}

Number.prototype.add = function (arg){

return accAdd(arg,this);

}

//浮点数精确运算(减法)

function accSub(arg1,arg2){

return accAdd(arg1,-arg2);

}

Number.prototype.subtract = function (arg){

return accSub(this,arg);

}

//浮点数精确运算(乘法)

function accMul(arg1,arg2)

{

var m=0,s1=arg1.toString(),s2=arg2.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)

}

Number.prototype.mul = function (arg){

return accMul(arg, this);

}

//浮点数精确运算(除法)

function accDiv(arg1,arg2){

var t1=0,t2=0,r1,r2;

try{t1=arg1.toString().split(".")[1].length}catch(e){}

try{t2=arg2.toString().split(".")[1].length}catch(e){}

with(Math){

r1=Number(arg1.toString().replace(".",""))

r2=Number(arg2.toString().replace(".",""))

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

}

}

Number.prototype.div = function (arg){

return accDiv(this, arg);

}

//限制输入数字

function isNumber(e) {

if ($.browser.msie) {

if ( ((event.keyCode > 47) && (event.keyCode < 58)) ||

(event.keyCode == 8) ) {

return true;

} else {

return false;

}

} else {

if ( ((e.which > 47) && (e.which < 58)) ||

(e.which == 8) ) {

return true;

} else {

return false;

}

}

}

//字符串长度截取

function cutstr(str, len) {

var temp;

var icount = 0;

var patrn = /[^x00-xff]/;

var strre = "";

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

if (icount < len - 1) {

temp = str.substr(i, 1);

if (patrn.exec(temp) == null) {

icount = icount + 1;

} else {

icount = icount + 2;

}

strre += temp;

} else {

break

}

}

return strre + "...";

}

//获取域名主机

function getHost(url) {

var host = "null";

if (typeof url == "undefined" || null == url) {

url = window.location.href;

}

var regex = /^w+://([^/]*).*/;

var match = url.match(regex);

if (typeof match != "undefined" && null != match) {

host = match[1];

}

return host;

}

//判断某个值是否在所在范围

//rang=1 表示正整数[0,2147483647] 2表示float[0,3.4028235E38]

//return= 'empty' 表示输入为空,

function isRang(str,rang){

if(typeof str == "number"){

var num = Number(str);

//判断是否在正整数范围

if( rang == 1){

if(testPlusDigit(num)=="yes"){

if(num>=0&&num<=2147483647){

return "is_int";

}else{

return "is_not_int_rang";

}

}else{

return "is_not_int";

}

}else if(rang == 2){

if(testPriceFormat(num)=="yes"){

if(num>=0&&num<=3.4028235E38){

return "is_float";

}else{

return "is_not_float_rang";

}

}else{

return "is_not_float";

}

}else{

return "rang_is_not_right";

}

}else{

return "is_not_number";

}

}

分类:Javascript教程 时间:2012-06-16 人气:1
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