title: jQuery select list removes all options
body: <p>I have a <code>&lt;select&gt;</code> list, which has been populated with several options, but want to remove those options to start again. </p>
  
  <p>I am using jQuery and have tried the following:</p>
  
  <pre><code>$("#selectId").length = 0;
  </code></pre>
  
  <p>But this seems to have no effect. </p>
  
  <p>Part of my problem is that I am using Firebug to debug the JavaScript, but the debugger does not break at the breakpoint, so I cannot see what is going on. Should it break when the JavaScript is within the <code>&lt;head&gt;</code> of my HTML file?</p>