title: Change iframe src by clicking a link
body: <p>I have an <code>iframe</code> that looks like this:</p>
  
  <pre><code>&lt;iframe src="http://www.google.com" height=1000 width="500" id="myiframe"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>I want to create a link so that when I click on it, the iframe on the page changes. How can I do that using jQuery? Is it related to jQuery <code>attr</code>? </p>