$(document).ready(function() {
		var desplegable = $("#menu li a.desplegable");
    desplegable.bind("click",function() {
    	var submenu = $(this).next();
    	if (submenu.is(":hidden"))
    	{
    		desplegable.next().slideUp();
    		submenu.slideDown();
    	}
    	else{
    		submenu.slideUp();
    	}
    	return false;
  });
});