title: Sort mixed alpha/numeric array
body: <p>I have a mixed array that I need to sort by alphabet and then by digit</p>
  
  <pre><code>[A1, A10, A11, A12, A2, A3, A4, B10, B2, F1, F12, F3]
  </code></pre>
  
  <p>How do I sort it to be:</p>
  
  <pre><code>[A1, A2, A3, A4, A10, A11, A12, B2, B10, F1, F3, F12]
  </code></pre>
  
  <p>I have tried </p>
  
  <pre><code>arr.sort(function(a,b) {return a - b});
  </code></pre>
  
  <p>but that only sorts it alphabetically. 
  Can this be done with either straight JavaScript or jQuery?</p>