Home > Web Front-end > JS Tutorial > Regular expression to determine Chinese numbers and letters in js (example)_javascript skills

Regular expression to determine Chinese numbers and letters in js (example)_javascript skills

WBOY
Release: 2016-05-16 17:52:18
Original
1515 people have browsed it

/*
判斷指定的內容是否為空,若為空則彈出警告框
*/
function isEmpty(theValue, strMsg){
if(theValue==""){
alert(strMsg "不能為空!");
return true;
}
return false;
}
/*
中文判斷函數,允許生僻字用英文“ *」取代
回傳true表示是符合條件,回傳false表示不符合
*/
function isChinese(str){
var badChar ="ABCDEFGHIJKLXYOPQRST ;
badChar = "0123456789";
badChar = " " " ";//半角與全角空格
badChar = "www.jb51.net不包含*或.的英文符號
if( ""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);//字串str中的字元
if (badChar.indexOf(c) > -1){
return false;
}
}
return true;
}
/*
數字判斷函數,傳回true表示是全部數字,回傳false表示不全部是數字
*/
function isNumber(str){
if(""==str){
return false;
}
var reg = /D/;
return str.match(reg)==null;
}
/*
判斷給定的字串是否為指定長度的數字
是回傳true,不是回傳false
*/
function isNumber_Ex(str,len){
if(""==str){
return false;
}
if(str .length!=len){
return false;
}
if(!isNumber(str)){
return false;
}
return true;
}
/*
money判斷函數,允許第一位為"-"來表示欠錢
回傳true表示格式正確,回傳false表示格式錯誤
*/
function isMoney(str) {
if(""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);
if(i ==0){
if(c!="-"&&(c
"9")){ return false;
}else if(c=="-"&&str.length ==1){
return false;
}
}else if(c
"9"){ return false;
}
}
return true true ;
}
/*
英文判斷函數,回傳true表示是全部英文,回傳false表示不全部是英文
*/
function isLetter(str){
if( ""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);
if((c
"z ")&&(c"Z")){ return false;
}
}
return true;
}
/*
空格判斷,當包含有空格回傳false,當不包含一個空格回傳true
""不能被判斷
*/
function notInSpace(str){
if(""==str){
return false;
}
var badChar =" ";
badChar = " ";
for(var i=0;i var c = str.charAt(i);//字符串中的字符
if(badChar.indexOf(c) > -1){
return false;
}
}
return true;
}
/*
**號判斷函數,回傳true表示是**號,回傳false表示不符合規範
*/
function isFPH(str){
if(""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);
if((c
"9") && (c!="-" )&&(c!=",")){ return false;
}
}
return true;
}
/*
電話判斷函數,允許「數字」、「;」、「-」、「(」、」)「,
true表示是電話號碼
*/
function isTelephone(str){
var trueChar = "() -;1234567890";
if(""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);//字串str中的字元
if(trueChar.indexOf(c) == -1) return false;
}
return true;
}
/**
學制可以為1-7,也可以為3.5這種形式,不能超過7年或低於1年
*/
function isXZ(str){
if(""==str){
return false;
}
var reg = /^[1-6](.5)?$ /;
var r = str.match(reg);
if(null!=r){
return true;
}else{
if(str=="7") {
return true;
}else{
return false;
}
}
}
/*
判斷憑證編號是否符合要求,憑證編號包含中文、數字、大小寫字母、(、)、-
是回傳true,不是回傳false
*/
function isZSBH(str){
if(""==str){
return false;
}
for(var i=0;i var c = str.charAt(i);
alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
alpha = "abcdefghijMNOPQRSTUVWXYZ";
alpha = "abcdefghijmnopq. alpha = "()-";
if(!isChinese(c)&&!isNumber(c)&&alpha.indexOf(c)==-1){
return false;
}
}
return true;
}
/*
身分證判斷函數,是傳回true,不是回傳false
15位元數字,18位元數字或最後一位為X(大寫)
*/
function isSFZ(str){
if(""==str){
return false;
}
if(str.length!=15&&str.length!= 18){//身分證長度不正確
return false;
}
if(str.length==15){
if(!isNumber(str)){
return false ;
}
}else{
str1 = str.substring(0,17);
str2 = str.substring(17,18);
alpha = "X0123456789"; >if(!isNumber(str1)||alpha.indexOf(str2)==-1){
return false;
}
}
return true;
}
/ *
得到今天的年,月,日
呼叫方法:today = new getToday(); 則today.year為今天的年以此類推
*/
function getToday(){
this.now = new Date();
this.year = this.now.getFullYear();
this.month = this.now.getMonth();
this.day = this. now.getDate();
}

js determines numbers, letters, Chinese
1.
var reg = /^(w|[u4E00-u9FA5])*$/;
if(arr=username.match( reg))
{
ti=1;
return ture;
}
else
{
alert("Username is only allowed to be a mixture of English, numbers and Chinese characters ,nPlease check whether there are spaces or other symbols before and after");
ti=0;
return false;
}
2. Use regular expressions to limit the input content of the text box in the web form:
Use regular expressions to limit input to Chinese only: onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData ('text').replace(/[^u4E00-u9FA5]/g,''))"
Use regular expressions to limit the input of only full-width characters: onkeyup="value=value.replace(/[^uFF00 -uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^uFF00-uFFFF]/g,''))"
Use regular expressions to limit input to numbers: onkeyup="value=value.replace(/[^d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text') .replace(/[^d]/g,''))"
Use regular expressions to limit input to numbers and English only: onkeyup="value=value.replace(/[W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^d]/g,''))"

Number


Letters







-------------------------- -------------------------------------
/**
* Some commonly used JavaScript functions (methods)
*
* For ease of use, all methods are written as String objects
* Save them as .js files to easily expand string objects Function
*
* Method name function
* ----------- ----------------------- ----------
* Trim removes the first space
* Occurs counts the number of occurrences of the specified character
* isDigit checks whether it consists of numbers
* isAlpha checks whether it consists of numbers, letters and Underscores
* isNumber Check whether it is a number
* lenb Return the number of bytes
* isInChinese Check whether it contains Chinese characters
* isEmail Simple email check
* isDate Simple date check, successfully return the date Object
* isInList Checks whether there is a character character in the list
* isInList Checks whether there is a character character
in the list*/
/*** Remove leading and trailing spaces ***/
String.prototype.Trim = function() {
return this.replace(/(^s*)|(s*$)/g, "");
}
/*** Count the number of occurrences of the specified character ***/
String.prototype.Occurs = function(ch) {
// var re = eval("/[^" ch "]/g") ;
// return this.replace(re, "").length;
return this.split(ch).length-1;
}
/*** Check if it consists of numbers ***/
String.prototype.isDigit = function() {
var s = this.Trim();
return (s.replace(/d/g, "").length == 0);
}
/*** Check if it consists of numbers, letters and underscores ***/
String.prototype.isAlpha = function() {
return (this.replace(/w/g, "").length == 0);
}
/*** Check if it is a number ***/
String.prototype.isNumber = function() {
var s = this.Trim();
return (s.search(// ^[ -]?[0-9.]*$/) >= 0);
}
/*** Return the number of bytes ***/
String.prototype.lenb = function() {
return this.replace(/[^x00-xff]/g,"**").length;
}
/*** Check if it contains Chinese characters ***/
String.prototype.isInChinese = function( ) {
return (this.length != this.replace(/[^x00-xff]/g,"**").length);
}
/*** Simple email check ***/
String.prototype.isEmail = function() {
var strr;
var mail = this;
var re = /(w @w .w )(.{0,1}w* )(.{0,1}w*)/i;
re.exec(mail);
if(RegExp.$3!="" && RegExp.$3!="." && RegExp.$2! =".")
strr = RegExp.$1 RegExp.$2 RegExp.$3;
else
 if(RegExp.$2!="" && RegExp.$2!=".")
strr = RegExp.$1 RegExp.$2;
else
strr = RegExp.$1;
return (strr==mail);
}
/*** Simple date check, successfully returns date object ***/
String.prototype.isDate = function() {
var p;
var re1 = /(d{4})[Year./-](d{1,2})[Month./-]( d{1,2})[Day]?$/;
var re2 = /(d{1,2})[Month./-](d{1,2})[Day./-]( d{2})[year]?$/;
var re3 = /(d{1,2})[month./-](d{1,2})[day./-](d{ 4})[year]?$/;
if(re1.test(this)) {
p = re1.exec(this);
return new Date(p[1],p[2 ],p[3]);
}
if(re2.test(this)) {
p = re2.exec(this);
return new Date(p[3],p [1],p[2]);
}
if(re3.test(this)) {
p = re3.exec(this);
return new Date(p[3] ,p[1],p[2]);
}
return false;
}
/*** Check if there is a character character in the list ***/
String.prototype.isInList = function(list) {
var re = eval("/[" list "]/"); <script> <BR>function check() <BR>{ <BR>if(!isNaN(document.all.form.str.value)) <BR>{ <BR>alert("数字"); <BR>} <BR></script>return re.test(this); <script> <BR>function check() <BR>{ <BR>var str = /[_a-zA-Z]/; <BR>if(str.test(document.all.form.str.value)) <BR>{ <BR>alert("字母"); <BR>} <BR>} <BR></script>}
Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template