$(document).ready(function(){

		$('#about-contents').css('display','none');
		$('#works-contents').css('display','none');
		$('#contact-contents').css('display','none');
		$('.portfolio-contents').css('display','none');

		$('#about-selector').click(function() {
		$('#about-contents').slideToggle(500);
		$('#works-contents').slideUp(500);
		$('#contact-contents').slideUp(500);
		return false;
		});

		$('#works-selector').click(function() {
		$('#works-contents').slideToggle(500);
		$('#about-contents').slideUp(500);
		$('#contact-contents').slideUp(500);
		return false;
		});

		$('#contact-selector').click(function() {
		$('#contact-contents').slideToggle(500);
		$('#about-contents').slideUp(500);
		$('#works-contents').slideUp(500);
		return false;
		});

		$('.portfolio-selector').click(function() {
		$(this).next('.portfolio-contents').slideToggle(500);
		return false;
		});

		$('.header').hover(
		function() {
		$(this).animate({"top": "-=20px"}, 200);
		}, 
		function () {
		$(this).animate({"top": "+=20px"}, 800);
		});
	});