title: The code is stopped working after adding the jquery-.XXmin.js in script tag
body: <p>i downloaded a Html5 open source memory game  code i'm trying to add it some fonctionnalities but the buttons action and removeClass()  ,addClass() ... methods didn't work so i remember to add the jquery.js in script tag but after that the game didn't work again .
  I think it's a problem with the prototype.s2.min.js.
  here's the code :</p>
  
  <p>Html:</p>
  
  <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"    
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
  
     &lt;html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"&gt;
     &lt;head&gt;
  &lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;
  &lt;meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /&gt;
  &lt;title&gt;scripty2 Memory!&lt;/title&gt;
  &lt;link href="memory.css" media="screen" rel="Stylesheet" type="text/css" /&gt;
   &lt;/head&gt;
   &lt;body&gt;
  
  &lt;div id="field"&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
  
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
  
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
  
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
    &lt;div class="card"&gt;&lt;img src="back.png"/&gt;&lt;/div&gt;
  
    &lt;div id="score"&gt;0&lt;/div&gt;
    &lt;div id="tries"&gt;0&lt;/div&gt;
  &lt;/div&gt;
  
  &lt;!--&lt;div id="controls"&gt;
    &lt;a href="#" onclick="shuffle()"&gt;shuffle cards&lt;/a&gt;&lt;br/&gt;
    &lt;a href="#" onclick="shuffle(3)"&gt;shuffle cards (slowly)&lt;/a&gt;
  &lt;/div&gt;--&gt;
  
  &lt;script type="text/javascript" src="prototype.s2.min.js"&gt;&lt;/script&gt;
   &lt;script type="text/javascript" src="memory.js"&gt;&lt;/script&gt;
    &lt;script  src="js/jquery-1.6.min.js"&gt;&lt;/script&gt; // i added this 
   &lt;/body&gt;
   &lt;/html&gt;
  </code></pre>
  
  <p>i didn't change the js and the css code .
  Any idea Please 
  Thank you in advance </p>