please critique!

please critique!

Hello all and thank you for any help.

I have just finished building the following, which does work, however I am not sure if it is running as good as it can. May I please get some instructional criticism and possibly some ideas on ways to make the performance better?

Thank you in advance

<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css"/>
<title>Stream Status</title>
</head>
<body>
<table></table>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<script type="text/javascript" src="new_process.js"></script>
</body>
</html>



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

function over(){
    setTimeout( function() {
    poll_db();
    over();
    }, 200);

}

function poll_db(){

    $.getJSON("process.php", function(obj) {
        $("body").empty();
       
        $.each(obj.result, function() {           
           
            $("body").append("<tr>"+"</tr>");
            $("body").append("<td>"+this['Machine']+"</td>");
            $("body").append("<img src=" +this['Status'] + ".png></img>");
            $("body").append("<img src=" +this['Push'] + ".png></img>");
            $("body").append("<img src=" +this['Back'] + ".png></img>");               

        }); 
    });
};