$(document).ready(function() {
  			$('#container > div').hide();
			$('#container').append('<div style="width: 0; height: 0; position: absolute;"></div>');
			$('#navigation  a').click(function() {    		
				var n = $('#navigation a').index(this)+1;
				$('#container div:visible').slideUp('slow', function() {
					$('#container div:nth-child('+n+')').slideDown('slow');
				});
				return false;
  			});
		});