title: Jquery find all ids starting with a string?
body: <p>Just wondered how I would search for all the ids starting with "content_" in the whole page and also a way to only find them in a named div called "extra_content". Once i have all the ids i want to hide them.</p>
  
  <p>Below is an example of what i want to find.</p>
  
  <pre><code>&lt;div id="content_1"&gt;&lt;/div&gt; &lt;-- Find
  &lt;div id="content_2"&gt;&lt;/div&gt; &lt;-- Find
  &lt;div id="contet_3"&gt;&lt;/div&gt;
  
  &lt;div id="extra_content"&gt; 
      &lt;div id="content_extra_1"&gt;&lt;/div&gt; &lt;-- Find
      &lt;div id="content_extra_2"&gt;&lt;/div&gt; &lt; -- Find
  &lt;/div&gt;
  </code></pre>
  
  <p>Examples would be helpful.</p>
  
  <p>Thanks</p>