title: jQuery Return elements where ID begins with a certain string
body: <p>I have a lot of <code>&lt;span&gt;</code> tags like this <code>&lt;span id='val_Title'&gt;&lt;/span&gt; &lt;span id='val_Name'&gt;&lt;/span&gt;</code></p>
  
  <p>I would like to return all the elements that begin with 'val_' and hide them.</p>
  
  <p>How can I do this?</p>