$(document).ready(function() {
	// Expand only the active menu, which is determined by the class name
  $("#nav ul").hide();
  
  $(".selected_cat_lev_0").find("ul").show();

	// Toggle the selected menu's class and expand or collapse the menu
	$("#nav > li > a").click(function() 
  {
    var checkElement = $(this).find("+ ul");
    var visible = false;
    if(checkElement.is(':visible')) 
      visible = true;
      
    $("#nav ul").hide("fast");
    
    if(visible == false)
      checkElement.show("fast");
    else
      checkElement.hide("fast");
	});
});