title: jQuery find file extension (from string)
body: <p>I was wondering if it was possible for jQuery to find a file extension based on a returned string?</p>
  
  <p>A filename (string) will be passed to a function (openFile) and I wanted that function to do different things based on what file has been passed through, it could be image files or pdf files.</p>
  
  <pre><code>function openFile(file) { 
  
    //if .jpg/.gif/.png do something
  
    //if .zip/.rar do something else
  
    //if .pdf do something else
  
  };
  </code></pre>
  
  <p>I've been looking for something that will find the file's extension but I can't seem to find anything.</p>