$(document).ready(function(){
	$(function() { 
		$("#gnavi a img").hover(
			function () {
				$(this).css("opacity","0.5");},
			function () {
				$(this).css("opacity","1");}
		);
		$(".sample").hover(
			function () {
				$(this).css("opacity","0");},
			function () {
				$(this).css("opacity","1");}
		);
		$(".current img").css("opacity","0.5");
		$(".current img").hover(
			function () {
				$(this).css("opacity","0.5");},
			function () {
				$(this).css("opacity","0.5");}
		);
	});
});