title: javascript: firefox selectedIndex on combobox
body: <p>I have a simple little combobox on my web page:</p>
  
  <pre><code>&lt;select id="famNum" onchange="familySize()"&gt;
         &lt;option value="0"&gt;0&lt;/option&gt;
         &lt;option value="1"&gt;1&lt;/option&gt; &lt;!-- etc --&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>And if I use:</p>
  
  <pre><code>famNum.selectedIndex = 0;
  </code></pre>
  
  <p>it works fine in Safari but not in firefox.  I even tried using jQuery:</p>
  
  <pre><code>$('#famNum').selectedIndex = 0;
  </code></pre>
  
  <p>but still firefox won't do it.  How can I get this to work in firefox?  It keeps saying "famNum is not defined"</p>