Alert.html

<!DOCTYPE html>
<html>
    <head>
        <title>alert demo</title>
        <link rel="stylesheet" href= "css/jquery.mobile-1.4.2.css"/>
        <meta name="viewport" content="width=device-width, initial-scale=1">
    </head>
    <body>
        <script type="text/javascript"  src="phonegap.js"></script>
        <script type="text/javascript"src = "js/index.js"></script>
        <script type="text/javascript" src = "js/jquery-2.1.0.js"></script>
        <script  src = "js/jquery.mobile-1.4.2.min.js"></script>
        <script type="text/javascript">
            app.initialize();
        </script>
        <input type = "text" placeholder="User name"/>
        <input type = "password" placeholder ="Password"/>
        <button id="Submit" onClick="app.submit()">Log in</button>
        <button id="clear" onClick="app.reset ()">Clear </button>
    </body>
</html>