title: JQuery: use <span> from string in checkbox value
body: <p>I have a string of HTML contained in a var called "content". The string of HTML contains a span with an id, eg:</p>
  
  <pre><code>&lt;span id="valuespan"&gt;This is the value of a text box&lt;/span&gt;
  </code></pre>
  
  <p>I want to use whatever is contained between the span tags as a value for a check box, but im not really sure how to do this.</p>
  
  <p>Can anyone help me out?</p>
  
  <p>Thanks!</p>