title: select in dropdownlist a value, without id
body: <p>i want to select the 3rd value (Moon)
  the html</p>
  
  <pre><code>    &lt;select name="planettype" onChange="updateVars()" onKeyUp="updateVars()"&gt;
                      &lt;option value="1" selected="selected"&gt;Planet&lt;/option&gt;
  &lt;option value="2"&gt;Debris Field&lt;/option&gt;
  &lt;option value="3"&gt;Moon&lt;/option&gt;
  
                      &lt;/select&gt;
  </code></pre>
  
  <p>i tested:</p>
  
  <p>void(document.getElementsByTagName("planettype").text = 'Moon');
  void(document.getElementsByTagName("planettype").value = '3');</p>
  
  <ul>
  <li>not working</li>
  </ul>
  
  <p>i can not even "access" the dropdown list, there is a way to do that?</p>