function slideSwitch() {
				var $ativa = $('#home IMG.ativa');
				if ( $ativa.length == 0 ) $ativa = $('#home IMG:last');
					var $next =  $ativa.next().length ? $ativa.next()
						: $('#home IMG:first');
						$ativa.addClass('ultima-ativa');
						$next.css({opacity: 0.0})
						.addClass('ativa')
						.animate({opacity: 2.0}, 2000, function() {
							$ativa.removeClass('ativa ultima-ativa');
						});
}

$(function() {
	setInterval( "slideSwitch()", 3000 );
});

// Menu	
function subirMenu(){
	$('#menu_head').slideUp(450);
	setTimeout("descerMenu()", 150);
}
		
function descerMenu(){
	$('#menu_body').slideDown(450);
}
			
function subirMenuBody(){
	$('#menu_body').slideUp(450);
	$('#menu_head').slideDown(700);
	$('#submenu_body1').slideUp('slow');
	$('#submenu_body2').slideUp('slow');
	$('#submenuBooks').slideUp('slow');
}
			
function descerSubmenu1(){
	$('#submenu_body1').slideDown('slow');
	$('#submenu_body2').slideUp('slow');
}
			
function descerSubmenu2(){
	$('#submenu_body2').slideDown('slow');
	$('#submenu_body1').slideUp('slow');
}
			
function descerBooks(){
	$('#submenuBooks').slideDown('slow');
}

function subirSubmenus(){
	$('#submenu_body1').slideUp('slow');
	$('#submenu_body2').slideUp('slow');
	$('#submenuBooks').slideUp('slow');
}