Page redirection in phonegap 3.x

<html>
    <head>
        <meta charset="utf-8" />
        <meta name="format-detection" content="telephone=no" />
        <!-- WARNING: for iOS 7, remove the width=device-width and height=device-height attributes. See https://issues.apache.org/jira/browse/CB-4323 -->
        <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />
        <link rel="stylesheet" type="text/css" href="css/index.css" />
        <title>Hello World</title>
    </head>
    <body>
        <div class="app">
            <h1>PhoneGap</h1>
            <div id="deviceready" class="blink">
                <p class="event listening">Connecting to Device</p>
                <p class="event received">Device is Ready</p>
            </div>
            <input type = "text" placeholder="username" id="inputBox1"/> </br/>
            <input type= "password" placeholder= "password" id="passwordBox1" /><br/>
            <button onclick="submit()" >Log IN</button>
            <button  onClick="reset()">Clear</button>
        </div>
        <script type="text/javascript" src="phonegap.js"></script>
        <script type="text/javascript" src="js/index.js"></script>
        <script type="text/javascript">
            app.initialize();
        </script>
         <script type="text/javascript">
            function submit() {
                alert("You have clicked the log In button");+
                window.location="inbox.html";
            }
             function reset() {
                alert("Are you sure you want to clear the fields?");
                document.getElementById("inputBox1").value="";
                document.getElementById("passwordBox1").value="";
             }
        </script>
    </body>
</html>