Error in <javascript> markups

Error in <javascript> markups

Hi all,

On my website I'd like to have 2 JQuery scripts, but 2 lines of code don't work with each other. These are:

  1. <script src="http://code.jquery.com/jquery-1.4.2.min.js" type="text/javascript" charset="utf-8"></script>
  2.   <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>

Any idea what is wrong? Thanks