Submit form with javascript external file -


i have login page:

<html>     <head>         <title>todo supply title</title>         <meta charset="utf-8">         <meta name="viewport" content="width=device-width">         <link rel="stylesheet" type="text/css" href="css/bootstrap.css" media="screen" />         <script src="http://code.jquery.com/jquery.js"></script>         <script type="text/javascript" src="js/loader.js"></script>     </head>     <body>         <div id ="header_login"></div>         <div id ="fdm_intro"></div>         <div id="footer"></div>     </body> </html>

and fallowing header:

<html>     <head>         <meta charset="utf-8">         <meta name="viewport" content="width=device-width">         <link rel="stylesheet" type="text/css" href="css/bootstrap.css" media="screen" />         <script type="text/javascript" src="login.js"></script>         <script src="login.js"></script>     </head>     <body>         <div id ="header">             <div class="navbar">                 <div class="navbar-inner">                     <a class="brand" href="#"> flight data monitor</a>                     <form name="login" action="" method="get" class="navbar-form pull-right">                         <input type="text" class="span2" placeholder="username" name="username">                         <input type="text" class="span2" placeholder="password" name="password">                         <button type="submit" class="btn" onclick="login(this.form);" >entrar</button>                     </form>                 </div>             </div>         </div>     </body> </html>

problem: cannot make alert in login.js. seems form not call javascript.... help??

you forget add jquery reference in html page. try code.

<html>     <head>     <meta charset="utf-8">     <meta name="viewport" content="width=device-width">     <link rel="stylesheet" type="text/css" href="css/bootstrap.css" media="screen" />     <script src="http://code.jquery.com/jquery-1.9.1.js"></script>           <script src="login.js"></script>     </head>     <body>     <div id ="header">         <div class="navbar">             <div class="navbar-inner">                 <a class="brand" href="#"> flight data monitor</a>                 <form name="login" action="" method="get" class="navbar-form pull-right">                     <input type="text" class="span2" placeholder="username" name="username">                     <input type="text" class="span2" placeholder="password" name="password">                     <button type="submit" class="btn" onclick="login(this.form);" >entrar</button>                 </form>             </div>         </div>     </div>     </body> </html>

login.js:

$(document).ready(function() {      alert();        });

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