Javascript验证中的正则表达式
我对javascript非常陌生，一直在玩正则表达式。我正在尝试创建一个简单的密码/用户名验证表单。我相信我的正则表达式是错误的，在某个地方我把语法弄乱了，因为它无法运行。谁能告诉我我做错了什么？谢谢 这是我的密码：Javascript验证中的正则表达式,javascript,Javascript,我对javascript非常陌生，一直在玩正则表达式。我正在尝试创建一个简单的密码/用户名验证表单。我相信我的正则表达式是错误的，在某个地方我把语法弄乱了，因为它无法运行。谁能告诉我我做错了什么？谢谢 这是我的密码： <html> <head> <title>Username/Password Validation</title> <script type="text/javascript"> function che
<html>
<head>
<title>Username/Password Validation</title>
<script type="text/javascript">
function check(username, password, passwordAgain)
{
// at least one number, one lowercase and one uppercase letter
// at least six - ten characters that are letters, numbers or the underscore
var pwd = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])\w{6,10}$/;
// at least six - ten characters that are letters, numbers or the underscore
//the first character CANNOT start with a digit
var user = /^!=.*\d\w{6,10}$/;
if (pwd.test(password)) && (user.test(username)) && (password == passwordAgain)
{
alert("Passed Validation");
}
else if (password != passwordAgain)
{
alert(Your passswords don't match.");
}
else if !(pwd.test(password)) && !(user.test(username))
{
alert(username + password + " Your password and username are not valid.");
}
else if !(pwd.test(password)) && (user.test(username))
{
alert(password + " This password is not valid.");
}
else
{
alert(username +" This username is not valid.");
}
</script>
</head>
<body>
<form>
<h3> Username-Password Validation </h3>
<ul>
<li> The username must be between 6 and 10 characters long. </li>
<li> The username must contain only letters and digits. </li>
<li> The username cannot begin with a digit. </li>
<li> The password and the repeat password must match. </li>
<li> The password must be between 6 and 10 characters. </li>
<li> The password must contain only letters and digits. </li>
<li> The password must have at least one lower case letter,<br /> at
least one upper case letter, and at least one digit. </li>
</ul>
Username: <input type = 'text' id = 'username' /> <br />
Password: <input type = 'text' id = 'password' /> <br />
Reenter Password: <input type = 'text' id = 'passwordAgain' /> <br/>
<p>
<input type ='button' onclick='check(username, password, passwordAgain )' value='Submit' />
<input type ='reset' value='Clear' />
</p>
</form>
</body>
</html>
用户名/密码验证
功能检查（用户名、密码、密码）
{
//至少一个数字、一个小写字母和一个大写字母
//至少六到十个字母、数字或下划线字符
var pwd=/^（？=.*\d）（？=.[a-z]）（？=.[a-z]）\w{6,10}$/；
//至少六到十个字母、数字或下划线字符
//第一个字符不能以数字开头
var user=/^！=.*\d\w{6,10}$/；
if（pwd.test（password））&&&（user.test（username））&&（password==password）
{
警报（“通过验证”）；
}
else if（password！=password）
{
警惕（你的佩剑不相配）；
}
否则如果！（pwd.test（密码））和&！（user.test（用户名））
{
警告（用户名+密码+“您的密码和用户名无效。”）；
}
否则如果！（pwd.test（密码））&&（user.test（用户名））
{
警报（密码+“此密码无效”）；
}
其他的
{
警报（用户名+“此用户名无效”）；
}
用户名密码验证
- 用户名长度必须介于6到10个字符之间
- 用户名只能包含字母和数字
- 用户名不能以数字开头
- 密码和重复密码必须匹配
- 密码必须介于6到10个字符之间
- 密码必须仅包含字母和数字
- 密码必须至少有一个小写字母，
at
至少一个大写字母和至少一个数字
用户名：
密码：
重新输入密码：
<html>
<head>
<title>Username/Password Validation</title>
<script type="text/javascript">
function check(username, password, passwordAgain){
//List of possible error messages
var errorList = '';
// at least six - ten characters that are letters, numbers or the underscore
var sixtotencharacters = /\w{6,10}$/;
// at least one number, one lowercase and one uppercase letter
var oneofeach = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])/;
//first character does not start with digit
var firstDigit = /^!=.*\d/;
//Begin validation
if (sixtotencharacters.test(password) && sixtotencharacters.test(username) && oneofeach.test(password) && firstDigit.test(username) && password == passwordAgain)
{
alert("Passed Validation");
}
else
{
if (password != passwordAgain){
errorlist = 'Your passswords don\'t match. ';
}if (!sixtotencharacters.test(username)){
errorlist = errorlist + 'Username needs to be six to ten characters. ';
}if (!sixtotencharacters.test(password)){
errorlist = errorlist + 'Password needs to be six to ten characters. ';
}if (!oneofeach.test(password)){
errorlist = errorlist + 'You need to have at least one number, one lowercase and one uppercase letter. ';
}if (!firstDigit.test(username)){
errorlist = errorlist + 'First character of username can\'t be a digit. ';
}
alert(errorlist);
}
</script>
</head>
<body>
<form>
<h3> Username-Password Validation </h3>
<ul>
<li> The username must be between 6 and 10 characters long. </li>
<li> The username must contain only letters and digits. </li>
<li> The username cannot begin with a digit. </li>
<li> The password and the repeat password must match. </li>
<li> The password must be between 6 and 10 characters. </li>
<li> The password must contain only letters and digits. </li>
<li> The password must have at least one lower case letter,<br /> at
least one upper case letter, and at least one digit. </li>
</ul>
Username: <input type = 'text' id = 'username' /> <br />
Password: <input type = 'text' id = 'password' /> <br />
Reenter Password: <input type = 'text' id = 'passwordAgain' /> <br/>
<p>
<input type ='button' onclick='check(username, password, passwordAgain )' value='Submit' />
<input type ='reset' value='Clear' />
</p>
</form>
</body>
</html>
用户名/密码验证
功能检查（用户名、密码、密码）{
//可能的错误消息列表
var errorList=''；
//至少六到十个字母、数字或下划线字符
var sixtotentcharacters=/\w{6,10}$/；
//至少一个数字、一个小写字母和一个大写字母
var OneOfech=/^（？=.*\d）（？=.[a-z]）（？=.[a-z]）/；
//第一个字符不以数字开头
var firstDigit=/^！=.*\d/；
//开始验证
if（sixtotentcharacters.test（密码）&&sixtotentcharacters.test（用户名）&&oneofeach.test（密码）&&firstDigit.test（用户名）&&password==password）
{
警报（“通过验证”）；
}
其他的
{
if（password！=password）{
errorlist='您的密码不匹配'；
}如果（！sixtotencharacters.test（用户名））{
errorlist=errorlist+“用户名必须是六到十个字符。”；
}如果（！sixtotencharacters.test（密码））{
errorlist=errorlist+“密码必须是六到十个字符。”；
}如果（！oneofeach.test（密码））{
errorlist=errorlist+“您需要至少有一个数字、一个小写字母和一个大写字母。”；
}如果（！firstDigit.test（用户名））{
errorlist=errorlist+“用户名的第一个字符不能是数字。”；
}
警报（错误列表）；
}
用户名密码验证
- 用户名长度必须介于6到10个字符之间
- 用户名只能包含字母和数字
- 用户名不能以数字开头
- 密码和重复密码必须匹配
- 密码必须介于6到10个字符之间
- 密码必须仅包含字母和数字
- 密码必须至少有一个小写字母，
at
至少一个大写字母和至少一个数字
用户名：
密码：
重新输入密码：
<script>
window.onload = check() {
document.getElementById('btnSubmit').addEventListener('click', check() {
var errors = [];
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
var passwordAgain = document.getElementById('passwordAgain').value;
var errorList = document.getElementById("errors");
errorList.innerHTML = '';
if (password != passwordAgain) { errors.push("Your passwords do not match") }
var hasNumber = password.match(/\d+/);
if (hasNumber == null) { errors.push("You did not include a number in your password") }
var hasUpper = password.match(/[A-Z]+/);
if (hasUpper == null) { errors.push("You did not include an Uppercase Letter in your password") }
var hasLower = password.match(/[a-z]+/);
if (hasLower == null) { errors.push("You did not include an Lowercase Letter in your password") }
var hasAtleast6lessThan10password = password.length < 6 || password.length > 10;
if (hasAtleast6lessThan10password) { errors.push("Your password must be at least 6 characters long and cannot be more than 10") }
var hasAtleast6lessThan10username = username.length < 6 || username.length > 10;
if (hasAtleast6lessThan10username) { errors.push("Your username must be at least 6 characters long and cannot be more than 10") }
var firstCharacterNotDigit = username.match(/^[^\d]/);
if (firstCharacterNotDigit == null) { errors.push("Your username may not begin with a number") }
if (errors.length > 0) {
for (var i = 0; i < errors.length; i++) {
var errorElem = document.createElement("li");
errorElem.innerHTML = errors[i];
errorList.appendChild(errorElem);
}
}
});
};
</script>
</head>
<body>
<form>
<h3> Username-Password Validation </h3>
<ul>
<li> The username must be between 6 and 10 characters long. </li>
<li> The username must contain only letters and digits. </li>
<li> The username cannot begin with a digit. </li>
<li> The password and the repeat password must match. </li>
<li> The password must be between 6 and 10 characters. </li>
<li> The password must contain only letters and digits. </li>
<li> The password must have at least one lower case letter,<br /> at
least one upper case letter, and at least one digit. </li>
</ul>
Username: <input type = 'text' id = 'username' size="10" /> <br />
Password: <input type = 'text' id = 'password' size="10"/> <br />
Reenter Password: <input type = 'text' id = 'passwordAgain' size="10" /> <br/>
<p>
<input type ='button' onclick='check()' value='Submit' />
<input type ='reset' value='Clear' />
</p>
</form>
</body>
</html>
window.onload=check（）{
document.getElementById（'btnSubmit'）。addEventListener（'click'，check（））{
var错误=[]；
var username=document.getElementById（'username'）。值；
var password=document.getElementById（'password'）。值；
var passwordreach=document.getElementById（'passwordreach'）.value；
var errorList=document.getElementById（“错误”）；
errorList.innerHTML=''；
if（password！=password再次）{errors.push（“您的密码不匹配”）}
var hasNumber=password.match（/\d+/）；
if（hasNumber==null）{errors.push（“密码中没有包含数字”）}
var hasUpper=password.match（/[A-Z]+/）；
if（hasUpper==null）{errors.push（“密码中没有包含大写字母”）}
var hasLower=password.match（/[a-z]+/）；
if（hasLower==null）{errors.push（“密码中没有包含小写字母”）}
var hasAtleast6lessThan10password=password.length<6 | | password.length>10；
if（hasAtleast6lessThan10password）{errors.push（“您的密码长度必须至少为6个字符，且不能超过10”）}
var hasAtleast6lessThan10username=username.length<6 | | username.length>10；
if（hasAtleast6lessThan10username）{errors.push（“您的用户名长度必须至少为6个字符，且不能超过10”）}
var firstCharacterNotDigit=username.match（/^[^\d]/）；
if（firstCharacterNotDigit==null）{errors.push（“您的用户名不能以数字开头”）}
如果（errors.length>0）{
对于（var i=0；iif (pwd.test(password)) && (user.test(username)) && (password == passwordAgain)
alert(Your passswords don't match.");
alert("Your passswords don't match.");
else if !(pwd.test(password)) && !(user.test(username))
else if (!pwd.test(password) && !user.test(username))
else if !(pwd.test(password)) && (user.test(username))
else if (!pwd.test(password) && user.test(username))
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Password Checking with JavaScript</title>
<script>
window.onload = function() {
document.getElementById('btnSubmit').addEventListener('click', function() {
var errors = [];
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
var errorList = document.getElementById("errors");
errorList.innerHTML = '';
var hasNumber = password.match(/\d+/);
if (hasNumber == null) { errors.push("You did not include a number in your password") }
var hasUpper = password.match(/[A-Z]+/);
if (hasUpper == null) { errors.push("You did not include an Uppercase Letter in your password") }
var hasLower = password.match(/[a-z]+/);
if (hasLower == null) { errors.push("You did not include an Lowercase Letter in your password") }
var hasAtleast8lessThan10 = username.length < 6 || username.length > 10;
if (hasAtleast8lessThan10) { errors.push("You username must be at least 8 characters long and cannot be more than 10") }
var fisrtCharacterNotDigit = username.match(/^[^\d]/);
if (fisrtCharacterNotDigit == null) { errors.push("Your username may not begin with a number") }
if (errors.length > 0) {
for (var i = 0; i < errors.length; i++) {
var errorElem = document.createElement("li");
errorElem.innerHTML = errors[i];
errorList.appendChild(errorElem);
}
}
});
};
</script>
</head>
<body>
<ul id="errors"></ul>
<input type="textbox" name="username" id="username" size="3">
<input type="textbox" name="password" id="password" size="3">
<button id="btnSubmit" >Check Password</button>
</body>
</html>
<!DOCTYPE html >
<html>
<head>
<meta charset="UTF-8">
<title>Password Checking with JavaScript</title>
<script>
function check() {
var errors = [];
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
var passwordAgain = document.getElementById('passwordAgain').value;
if (password != passwordAgain) { errors.push("Your passwords do not match") }
var hasNumber = password.match(/\d+/);
if (hasNumber == null) { errors.push("You did not include a number in your password") }
var hasUpper = password.match(/[A-Z]+/);
if (hasUpper == null) { errors.push("You did not include an Uppercase Letter in your password") }
var hasLower = password.match(/[a-z]+/);
if (hasLower == null) { errors.push("You did not include an Lowercase Letter in your password") }
var hasAtleast6lessThan10password = password.length < 6 || password.length > 10;
if (hasAtleast6lessThan10password) { errors.push("Your password must be at least 6 characters long and cannot be more than 10") }
var hasAtleast6lessThan10username = username.length < 6 || username.length > 10;
if (hasAtleast6lessThan10username) { errors.push("Your username must be at least 6 characters long and cannot be more than 10") }
var firstCharacterNotDigit = username.match(/^[^\d]/);
if (firstCharacterNotDigit == null) { errors.push("Your username may not begin with a number") }
if (errors.length > 0) {
alert(errors.join('\r\r'));
}
};
</script>
</head>
<body>
<form>
<h3> Username-Password Validation </h3>
<ul>
<li> The username must be between 6 and 10 characters long. </li>
<li> The username must contain only letters and digits. </li>
<li> The username cannot begin with a digit. </li>
<li> The password and the repeat password must match. </li>
<li> The password must be between 6 and 10 characters. </li>
<li> The password must contain only letters and digits. </li>
<li> The password must have at least one lower case letter,<br /> at
least one upper case letter, and at least one digit. </li>
</ul>
Username: <input type = 'text' id = 'username' size="10" /> <br />
Password: <input type = 'text' id = 'password' size="10"/> <br />
Reenter Password: <input type = 'text' id = 'passwordAgain' size="10" /> <br/>
<p>
<input type ='button' onclick='check()' value='Submit' />
<input type ='reset' value='Clear' />
</p>
</form>
</body>
</html>
errorlist = errorlist + 'First character of username can't be a digit. ';
errorlist = errorlist + 'First character of username can\'t be a digit. ';
<html>
<head>
<title>Username/Password Validation</title>
<script type="text/javascript">
function check(username, password, passwordAgain){
//List of possible error messages
var errorList = '';
// at least six - ten characters that are letters, numbers or the underscore
var sixtotencharacters = /\w{6,10}$/;
// at least one number, one lowercase and one uppercase letter
var oneofeach = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])/;
//first character does not start with digit
var firstDigit = /^!=.*\d/;
//Begin validation
if (password != passwordAgain){
alert("Your passswords don't match.");
}else if (!sixtotencharacters.test(username)){
errorlist = 'Username needs to be six to ten characters. ';
}else if (!sixtotencharacters.test(password)){
errorlist = errorlist + 'Password needs to be six to ten characters. ';
}else if (!oneofeach.test(password)){
errorlist = errorlist + 'You need to have at least one number, one lowercase and one uppercase letter. ';
}else if (!firstDigit.test(username)){
errorlist = errorlist + 'First character of username can\'t be a digit. ';
}else{
alert("Passed Validation");
}
}
</script>
</head>
<body>
<form>
<h3> Username-Password Validation </h3>
<ul>
<li> The username must be between 6 and 10 characters long. </li>
<li> The username must contain only letters and digits. </li>
<li> The username cannot begin with a digit. </li>
<li> The password and the repeat password must match. </li>
<li> The password must be between 6 and 10 characters. </li>
<li> The password must contain only letters and digits. </li>
<li> The password must have at least one lower case letter,<br /> at
least one upper case letter, and at least one digit. </li>
</ul>
Username: <input type = 'text' id = 'username' /> <br />
Password: <input type = 'text' id = 'password' /> <br />
Reenter Password: <input type = 'text' id = 'passwordAgain' /> <br/>
<p>
<input type ='button' onclick='check(username, password, passwordAgain )' value='Submit' />
<input type ='reset' value='Clear' />
</p>
</form>
</body>
</html>