Polling mechanism through an Ajax call

I need to add polling mechanism to call a web service through my web page. For that I am trying to use an ajax call inside a javascript page. I am very new to ajax and javascript. I wrote the below code.

<html>
<head>
    <script language="JavaScript" type="text/javascript">
         function pollServerForNewMail() {
            setTimeout(function(){
            $.ajax({ url: "server", success: function(data){
                alert("TEST");
                poll();
            }, dataType: "json"});
        }, 10000);
</script>
</head>
<body>

</body>
</html>

What I need is to fire the alert TEST in every 10 seconds. Anybody please help me on this.

I will edit the post with my two jsp files.

index.jsp file

<html>
    <table style="width:100%;text-align:center;'">
<tr>
<td style="text-align:center;width:100%">                               
<a href="polling.jsp?reset=true"><img src="images/import.png" /></a>
</td>
</tr>
</table>
</html>

polling.jsp file

         <html>
            <head>
                <script language="JavaScript" type="text/javascript">
                     function pollServerForNewMail() {
                        setTimeout(function(){
                        $.ajax({ url: "server", success: function(data){
                            alert("TEST");
                            poll();
                        }, dataType: "json"});
                    }, 10000);
}
        pollServerForNewMail() ;  

          </script>
            </head>
            <body>
       </body>
        </html>

Thanks

Solution

I solved my problem by changing polling.jsp file as below. I will add my solution.

  <html>
    <head>
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
        <script>
            var set_delay = 5000,
                    callout = function () {
                        $.ajax({
                            /* blah */
                        })
                                .done(function (response) {
                                   alert("TEST");
                                })
                                .always(function () {
                                    setTimeout(callout, set_delay);
                                });
                    };
            callout();
        </script>
    </head>
    <body>

    </body>
    </html>