Uncaught TypeError: Object [object Object] has no method 'dataTable'

<link href="~/Scripts/jquery-ui.css" rel="stylesheet" />
<link href="~/Scripts/demo_table_jui.css" rel="stylesheet" />
<link href="~/Scripts/jquery.dataTables.css" rel="stylesheet" />
<link href="~/Scripts/jquery.dataTables_themeroller.css" rel="stylesheet" />
<script src="~/Scripts/jquery-1.7.2.js" type="text/javascript" language="javascript"></script>
<script src="~/Scripts/jquery.dataTables.js"></script>

<script type="text/javascript">
$(document).ready(function () {
$("#datatableDemo").dataTable();
});
</script>
<table id="datatableDemo">
<thead>
<tr>
<td></td>
</tr>
</thead>

</table>