title: Open and close side menu with same button
body: <p>Currently I use one button to display a side menu and another to close it</p>
  
  <pre><code>&lt;script&gt;
  $('#open-menu').click(function() {
    $("#mySidenav").css("width" , "250px");
    $("#l_m").css({"marginLeft": "250px", "position" : "absolute", "width" : "100%"});
    // $(this).attr('id','close-menu');
  });
  
  $('#close-menu').click(function() {
    $("#mySidenav").css("width" , "0");
    $("#l_m").css("marginLeft" , "0");
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>But I want the same button opens and closes my menu
  How to do ? Knowing that I use Jquery 1.11.3</p>
  
  <p>Thank you</p>
  
  <p>(I tried to add the line that is commented but when I click on it, nothing happens)</p>