title: CSS font declaration question
body: <p>whats the difference between this:</p>
  
  <pre><code>font-family: Arial, helevetica;
  </code></pre>
  
  <p>and this:</p>
  
  <pre><code>font: arial/ helvetica;
  </code></pre>
  
  <p>I've seen both but not really sure of the difference? </p>