$(document).ready(function(){
	$(".desplegable").parent().children('ul').addClass('oculto');
	
	$(".selected").parent().children('ul').removeClass('oculto');
	
	var lastSelected = $(".selected");
	$(".desplegable").click(function(){
		if(lastSelected != null){
			lastSelected.parent().children('ul').animate({
				height: 'toggle'
			}, 500, function() {});
			lastSelected.removeClass('selected');
		}
		if($(this).parent().children('ul').css('display')=='none'){
			$(this).parent().children('ul').animate({
				height: 'show'
				}, 500, function() {});
			$(this).addClass('selected');
			lastSelected = $(this);
		}
		else {
			lastSelected = null;
		}
		return false;
	});
});