You need to include jQuery before your Cycle
plugin, so reverse the order of your scripts here:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript" src="js/Cycle.js"></script>
Also, it's better to include CSS
before Javascript
as well as putting your Javascript
at the bottom of your page before closing </body>
tag.