//ヒストリーページ用

function changeImage(imageName){
		//new Effect.Opacity( 'large-img', { duration : 0.5, from : 0.0, to : 1.0 });
		new Effect.Fade( 'large-img' ,{ duration : 2, from : 0.1, to : 1.0 });
		//new Effect.Opacity( 'large-img', { duration : 2, from : 0.0, to : 1.0 });
		document.targetimage.src = imageName;
		
}