title: Change (toggle) css when clicked on another div
body: <p>When I click on a div with the classname 'show', i'm adding css to the div 'mobile-menu', this works perfect, but I would like to change the css to another height when I click on the the classname "show" again</p>
  
  <pre><code>$(".show").click(function() { 
  $('#mobile-menu').css({ 'height': '100%' });
  // when i click on .show again: .css({ 'height': '51px' });
  });
  </code></pre>