// Change Icon on Click + Slide Menu Down
 
$(document).ready(function() {
      $('.button-nav').click(function(){
            $(this).toggleClass('expanded');
        });
	  
	  // hides the slickbox as soon as the DOM is ready
  	  $('.nav-main').hide();
  
      $('.button-nav').click(function() {
      $('.nav-main').slideToggle(400);
      return false;
  	  });
	
});