function sub_menu(show){
	if(document.getElementById){
		if(show=='goods'){
		document.getElementById('menu_goods').style.display='block'
		}else{
		document.getElementById('menu_goods').style.display='none'
		}
	}
	if(document.all){
		if(show=='goods'){
		document.all.item('menu_goods').style.display='block'
		}else{
		document.all.item('menu_goods').style.display='none'
		}
	}
}

now=new Date();
month=now.getMonth()+1;

var siteURL = 'http://www.support.ne.jp/preview/nagataya/';

function season(){
	if(document.getElementById){
		if (month==12 || month<=2){
		document.getElementById('header').style.backgroundImage='url('+ siteURL +'season/winter.jpg)';
		}
		if (month>=3 && month<=4){
		document.getElementById('header').style.backgroundImage='url('+ siteURL +'season/spring.jpg)';
		}
		if (month>=5 && month<=9){
		document.getElementById('header').style.backgroundImage='url('+ siteURL +'season/summer.jpg)';
		}
		if (month>=10 && month<=11){
		document.getElementById('header').style.backgroundImage='url('+ siteURL +'season/autumn.jpg)';
		}
	}
	if(document.all){
		if (month==12 || month<=2){
		document.all.item('header').style.backgroundImage='url('+ siteURL +'season/winter.jpg)';
		}
		if (month>=3 && month<=5){
		document.all.item('header').style.backgroundImage='url('+ siteURL +'season/spring.jpg)';
		}
		if (month>=6 && month<=8){
		document.all.item('header').style.backgroundImage='url('+ siteURL +'season/summer.jpg)';
		}
		if (month>=9 && month<=11){
		document.all.item('header').style.backgroundImage='url('+ siteURL +'season/autumn.jpg)';
		}
	}
}