$(document).ready(function(){
	$('nav>ul>li').hover(
		function(){$(this).animate({backgroundPosition: '6px 0'});},
		function(){$(this).animate({backgroundPosition: '0 0'});}
	);
	
	$('.tab_panel>li:first').addClass('cur');
	$('.tab_content:first').show();
	$('.tab_panel>li').click(function(){
		$(this).addClass('cur').siblings('li').removeClass('cur');
		var curRel = $(this).attr('rel');
		$('.tab_content[rel='+curRel+']').show().siblings('div').hide();
	});
})