jqery text shortenin doesnot work with downloaded .js but onlin works..plz help

jqery text shortenin doesnot work with downloaded .js but onlin works..plz help

can u guys help me out with this code to work offline:
      <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script>
            Works!!!
      But...
      <script type="text/javascript"
src="javascript/Js_shorten_plugin.js"></script>
            this doesnot work
it works when i put the http but hte same file does not work when i use it offline