var $j = jQuery.noConflict();
function showNavigation (id) {
	var max_items = 4;
	for (var i = 1; i <= max_items; i++) {
		$j("#navi_"+i).fadeOut("slow").hide();
	}
	if (id != 0) {
		$j("#navi_"+id).fadeIn("slow");
	}
}