$(function(){		   
	/* pageup */	
	$("p.pageup a").click(
		function(event){
			$("#header").ScrollTo(400);	
			event.preventDefault();
		}	
	);
	   
	/* 次階層フッター処理 */	
	var season = function(){
		var d = (new Date()).getMonth();
		var s;
		(1<d && 5>d)?s="spring":
		(4<d && 8>d)?s="summer":
		(7<d && 11>d)?s="autumn":
		(10<d || 2>d)?s="winter":
		s="";
		return s;
	};	
	$("div#footer").css({"background":"url(../images/footer/bg_sfooter_"+season()+".gif) repeat-x"});
		
});