html - Confirming password using JavaScript -

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i need in making webpage.

when user types password, want statement 'the password not same' in part. don't understand wrong code.

<html>   <head>     <meta http-equiv="content-type" content="text/html; charset=utf-8" />     <title> login page </title>   </head>   <body>     <form action="login_2.php" method="post">       <input type="hidden" name="action" value="login">       <input type="hidden" name="hide" value="">       <table class='center'>         <tr><td>login id:</td><td><input type="text" name="id"></td></tr>         <tr><td>password:</td><td><input type="password" name="password"></td></tr><br>         <tr><td>confirm_password: </td><td><input type="password" name="confirm_password" onkeyup="test();"></td></tr><br>         <tr><td><div id="pwd" style="height: 35px;"></div></td></tr>         <tr><td>full name: </td><td><input type="text" name="name"></td></tr>       </form>       <script>         function test(){           if(document.info.password.value != document.info.confirm_password.value){             document.getelementbyid('pwd').innerhtml='wrong';           }else{             document.getelementbyid('pwd').innerhtml='continue';           }         }       </script>     </table>     <tr><td>&nbsp;</td><td><input type="submit" value="login"></td></tr>   </body> </html>

since there no id's on input fields can change document.info document.getelementsbyname

function test(){     if(document.getelementsbyname("password")[0].value != document.getelementbyid("confirm_password")[0].value){             document.getelementbyid('pwd').innerhtml='wrong';     }else{             document.getelementbyid('pwd').innerhtml='continue';     } }

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