jQuery don't run on my local server
<p>I have wrote this code on my local server (Installed Apache 2 on my Mac with MacPorts) but It haven't run.</p>

<p>JavasSript is active on Safari or Firefox, but it haven't do on these.
Is this code worse? Or I can try other way? Please help.   </p>

<pre><code>&lt;html&gt;
&lt;head&gt;
  &lt;title&gt; jquery test &lt;/title&gt;
   &lt;script src="http://www.google.com/jsapi"&gt;&lt;/script&gt;
   &lt;script&gt;
     // Load jQuery
     google.load("jquery", "1");
   &lt;/script&gt;

   &lt;script type="text/javascript"&gt;
    JQuery(function($){
     var $curr = $(".sel");
     $("button").click(function(){
      $curr.removeClass("sel");
      $curr.$curr.prev().addClass("sel") 
     });
    });
   &lt;/script&gt;
   &lt;style type="text/css"&gt;
   span { padding :8px;}
   .sel { border :orange solid 4px;}
   &lt;/style&gt;
      &lt;/head&gt;
      &lt;body&gt; 
   &lt;p&gt;
    &lt;span&gt;1&lt;/span&gt;
    &lt;span&gt;2&lt;/span&gt;
    &lt;span class="sel"&gt;3&lt;/span&gt;
    &lt;span&gt;4&lt;/span&gt;
    &lt;span&gt;5&lt;/span&gt;
    &lt;button&gt;click&lt;/button&gt;
   &lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
