title: Problems with binding variable with Jquery object
body: <p>What are the limitations/problems of binding a variable to the Jquery Object. 
  I have a function in file A that I would like to access in file B. So in order to do that I bind it to the Jquery Object. I feel there might be reasons not to do that. But I can't think of any. Can anyone help me</p>
  
  <p>e.g </p>
  
  <pre><code>    // File A
      $.sayHello = function sayHello(){
          alert("Hello");
      }
  
      //File B
      $.sayHello();
  </code></pre>
  
  <p>what are the problems with this.</p>