title: Keep getting "Uncaught TypeError: $(...). is not a function"
body: <p>Im not a jQuerywiz, but I keep getting the "Uncaught TypeError: $(...). is not a function" on jQueryscripts. I'm trying to understand why I get them. </p>
  
  <p>This is the code: </p>
  
  <pre><code>&lt;script type="text/javascript" src="http://shop.xeptor.se/fileupload/jquery-1.7.2.min.js"&gt;&lt;/script&gt;
  &lt;script type="text/javascript" src="http://shop.xeptor.se/fileupload/jquery.blackcalculator.src.js"&gt;&lt;/script&gt;
  
  &lt;div class="calculator"&gt;&lt;/div&gt;
  &lt;script type="text/javascript"&gt;
   $(document).ready(function(){
     var langs = {value: 'Valor', clear: 'Limpar', backspace: 'Voltar'};
     $('.calculator').blackCalculator({
       type:'advanced',
       allowKeyboard:true,
       css:'styles/',
       language:langs
     });
   });
  &lt;/script&gt;
  </code></pre>