$(document).ready( function($) {
 
  // This hides all the sub menus on page load
  $('#nav-main ul.sub-menu').hide();
  // This makes sure that all the sub menus are open when applicable
  $('#nav-main li.current-menu-item').children().show();
  // This keeps the nav open to the item that you are navigating to.
  $('#nav-main li.current-menu-item').parents().show(); 
 
  $('#nav-main ul li a').click(
    function() {
      var checkElement = $(this).next();
      if((checkElement.is('ul')) && (checkElement.is(':visible'))) {
        return false;
        }
      if((checkElement.is('ul')) && (!checkElement.is(':visible'))) {
        $(this).parent().siblings("li:has(ul)").find("ul").slideUp('normal');
        $('#nav-main ul ul li ul:visible').slideUp('normal');
        checkElement.slideDown('normal');
        return false;
        }
      }
    );
  $('#nav-main ul ul li a').click(
    function() {
      var checkElement = $(this).next();
      if((checkElement.is('ul')) && (checkElement.is(':visible'))) {
        return false;
        }
      if((checkElement.is('ul')) && (!checkElement.is(':visible'))) {
        $('#nav-main ul ul').slideUp('normal');
        $('#nav-main ul ul li ul:visible').slideUp('normal');
        checkElement.slideDown('normal');
        return false;
        }
      }
    );  
 
});