title: jQuery determining if element exists on page
body: <p>How can I determine if an element exists on a page... for instance... </p>
  
  <pre><code>$('select[name="modifier_option"]')
  </code></pre>
  
  <p>If that select box exists on the screen I need to validate it's value on the page to ensure it's value is > 0, but if it doesn't exist I don't need to worry about it.</p>