var home_header_image = [
	'img/home/home-header-image01.jpg'
	,'img/home/top_01_02.jpg'
	,'img/home/top_shouji1.jpg'
	,'img/home/top_01_01.jpg'
	,'img/home/top_02_01.jpg'
	//,'img/home/top_yuki1.jpg'
];

var rand = Math.floor(Math.random()*home_header_image.length);
if (home_header_image[rand] != $('#header-inner').css('background-image')) {
	$('#header-inner').css('background-image', 'url("' + home_header_image[rand] + '")');
}