<div class="banner">
    <ul><li>This is my slider.</li><li>Pretty cool, huh?</li></ul>
</div>
<script src="//code.jquery.com/jquery-2.1.4.min.js"></script>
<script src="/path/to/unslider.js"></script> 
<script>$(function() { $('.banner').unslider() })</script>