jQuery(document).ready(function() {
	jQuery('#left .advertisement_list').each( function() {
		var advertisement_list = jQuery(this);
		var advertisement_index = 0;
		var advertisementTransition = function() {
			advertisement_list.children('a:eq('+advertisement_index+')').fadeOut('slow');
			advertisement_index = ( advertisement_index + 1 ) % advertisement_list.children('a').size();
			advertisement_list.children('a:eq('+advertisement_index+')').fadeIn('slow');
		};
		if ( advertisement_list.children('a').size() > 1 ) {
			advertisement_list.children('a:gt(0)').hide();
			setInterval( advertisementTransition, 8000 );
		}
	});
	
	jQuery('#right .advertisement_list').each( function() {
		var advertisement_list = jQuery(this);
		var advertisement_index = 0;
		var advertisementTransition = function() {
			advertisement_list.children('a:eq('+advertisement_index+')').fadeOut('slow');
			advertisement_index = ( advertisement_index + 1 ) % advertisement_list.children('a').size();
			advertisement_list.children('a:eq('+advertisement_index+')').fadeIn('slow');
		};
		if ( advertisement_list.children('a').size() > 1 ) {
			advertisement_list.children('a:gt(0)').hide();
			setInterval( advertisementTransition, 4000 );
		}
	});
});