Besides referring to the node <table_div>
instead of the id #table_div
you don't want to append anything to the table node.
You should take a look at this as well as here and here.
You should use tbody
when using Twitters Bootstrap anyways for example, like so:
<table id="table_div" class="table table-striped">
<tbody></tbody>
<table>
here the right js
for (i in data) {
$('#table_div > tbody:last').append('<tr><td>'+data[i]+'</td></tr>');
}
For more research look here Add table row in jQuery
Edit:
Ok i wrote you an entire example using twitters bootstrap and jQuery.
This works, if it doesn't for your data array, something is wrong with it.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="assets/css/bootstrap.css">
</head>
<body>
<table class="table table-striped" id="my-table">
<tbody>
</tbody>
</table>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript" src="assets/js/bootstrap.js"></script>
<script type="text/javascript">
var data = ["foo","bar"];
$(document).ready(function(){
$.each(data, function(i,item){
$('#my-table > tbody:last').append('<tr><td>'+item+'</td></tr>');
});
});
</script>
</body>
</html>