How do I change the position of JQuery Autocomplete from the top of the page?

How do I change the position of JQuery Autocomplete from the top of the page?

I have a JSFiddle here. Whenever I use the autocomplete, the available
options appear at the top of the page, instead of below the text box.
Other questions here hasn't helped.
What I want to do is move the available options below the text box, but I
don't know how to do it.
HTML here
<br><br><br><br><br><br><br><br><br><br><br>
<div class="ui-widget">
<label for="tags">Tags: </label>
<input id="tags" />
</div>
Javascript here
$(function() {
var availableTags = [
"ActionScript",
"AppleScript",
"Asp",
"BASIC",
"C",
"C++",
"Clojure",
"COBOL",
"ColdFusion",
"Erlang",
"Fortran",
"Groovy",
"Haskell",
"Java",
"JavaScript",
"Lisp",
"Perl",
"PHP",
"Python",
"Ruby",
"Scala",
"Scheme"
];
$( "#tags" ).autocomplete({
source: availableTags
});
});