tagsinput and autocomplete

HTML

<script src="http://xoxco.com/projects/code/tagsinput/jquery.tagsinput.js"></script>
<link rel="stylesheet" href="http://xoxco.com/projects/code/tagsinput/jquery.tagsinput.css">
<label>Tags: <br><input id="new_tags" /></label>

JavaScript

var tags_array = ["lorem", "ipsum", "dolar", "sit", "amet"];
$("#new_tags").tagsInput({
    'defaultText':'add...',
    'height':'100px',
    'width':'300px',
    'autocomplete_url': '',
    'autocomplete' :{
        'source': tags_array
    }
});//second attempt
//$("#new_tags_tagsinput").autocomplete({source: tags_array});