How to show an div when other div is not visible in the screen using jquery?
<p>I need  to show the <code>div#myDiv-1</code> when the <code>div#myDiv-2</code> is not visible in the screen using jquery</p>

<p>When the page load the <code>div#myDiv-2</code> is visible, then when the visitor <strong>scroll down</strong> and the <code>div#myDiv-2</code> is not visible anymore the <code>div#myDiv-1</code> is show up.</p>

<p>Sorry I don't post any code but I don't know how to start.</p>
