php - JavaScript and HTML Regex not working -


i have php page:

<?php     if($_server['request_method'] == 'post'){         echo $_post["username"];         echo $_post["password"];         echo $_post["confirm_password"];         echo $_post["email"];     } ?> <!doctype html> <html> <head>     <title>wordcat signups</title>     <script type="text/javascript" src="signup_validate.js"></script> </head> <body>     <form action="" method="post">         username:<br><input type="text" name="username" placeholder="username" onkeyup="check_username();"><span id="check_username"></span><br>         password:<br><input type="password" name="password" placeholder="password" onkeyup="check_password();"><span id="check_password"></span><br>         confirm password:<br><input type="password" name="confirm_password" placeholder="confirm password" onkeyup="check_passwords();"><span id="check_passwords"></span><br>         email:<br><input type="email" name="email" placeholder="email" onkeyup="check_email();"><span id="check_email"></span><br>         <input type="submit" name="submit" value="signup"></br>     </form> </body> </html>

i have javascript meant check fields:

function check_username(){     var username = document.getelementsbyname("username")[0].value;     var pattern = /^[\w[^!\"\#$%&\'()*+,\-.\/:;<=>?@\[\\\]^_`{|}~]]{1,32}$/;     if(pattern.test(username)){         document.getelementbyid("check_username").innerhtml = "username valid.";     } else {         document.getelementbyid("check_username").innerhtml = "username invalid. should contain letters, numbers, , underscores, have maximum of 32 characters.";     } } function check_password(){     var password = document.getelementsbyname("password")[0].value;     var pattern = /^(?=.*[a-z])(?=.*[a-z])(?=.*\d)([a-za-z0-9!\"\#$%&\'()*+,\-.\/:;<=>?@\[\\\]^_`{|}~]{6,})$/;     if(pattern.test(password)){         document.getelementbyid("check_password").innerhtml = "password valid.";     } else {         document.getelementbyid("check_password").innerhtml = "password invalid. should have @ least 6 characters, , @ least 1 number, uppercase, , lowercase character.";     } } function check_passwords(){     var password = document.getelementsbyname("password")[0].value;     var confirm_password = document.getelementsbyname("confirm_password")[0].value;     if(password == confirm_password){         document.getelementbyid("check_passwords").innerhtml = "passwords match";     } else {         document.getelementbyid("check_passwords").innerhtml = "passwords not match.";     } }

however, javascript, username , confirm password tests working, password regex not. when key in valid passwords. regex can found here link , correct tests. when use browser regex fails valid passwords online!

i don't see reason use single regex complex condition yours (other showing off regex-fu)...

if(     password.length >= 6 &&  // @ least 6 characters     /[0-9]/.test(password) && // @ least 1 number     /[a-z]/.test(password) && // @ least 1 lowercase character     /[a-z]/.test(password) // @ least 1 lowercase character ) {     // yay :) }

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