Show/Hide sidebar - is this approach sufficient?

Show/Hide sidebar - is this approach sufficient?

I count each click and when is odd I hide if even I show. All I need to do
is to set css.
Is there a better way to do it? Toggle doesn't actually work as my html
looks like this: I click on clickMe and the div #sidebar hides/shows.
<div id="sidebar">
<div>
<nav>
<ul>
<li><a href="#foo">HOME</a></li>
<li><a href="#bar">ABOUT US</a></li>
<li><a href="#baz">CONTACT US</a></li>
</ul>
</nav>
</div>
<div id="toggle">
<div class="clickMe"></div>
</div>
</div>