//MACの場合
if(navigator.appVersion.indexOf("Mac") > -1)
{
	document.write('<link rel="stylesheet" type="text/css" href="http://www3.nhk.or.jp/toppage/head0603/css/header_mac.css" />');
	
	//IEの場合
	//if( navigator.appName.charAt(0) == "M"){
		//document.write('<link rel="stylesheet" type="text/css" href="/toppage/head0603/css/header_mac_ie.css" />');
	//}
	
	//Netscapeの場合
	if(navigator.appName == "Netscape"){
		document.write('<link rel="stylesheet" type="text/css" href="/toppage/head0603/css/header_mac_nc.css" />');
	}

//Windowsの場合
}else{
	//Netscape Or FireFox
	if (navigator.appName == "Netscape"){
		document.write('<link rel="stylesheet" type="text/css" href="http://www3.nhk.or.jp/toppage/head0603/css/header_nc.css" />');
	}
	
	//Opera
	//if (navigator.userAgent.indexOf("Opera") > -1){
	//	document.write('<link rel="stylesheet" type="text/css" href="/toppage/head0603/css/header_op.css" />');
		
	//}
}

function preloadHeaderImages(){
	MM_preloadImages('http://www3.nhk.or.jp/toppage/head0603/img/program_list.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/program_list_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/search_go_btn.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/search_btn.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/search_btn_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/english_link.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/english_link_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mobile_link.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mobile_link_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/otoiawase_link.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/otoiawase_link_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/sitemap_link.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/sitemap_link_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/nhk_keiei.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/nhk_keiei_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/zenkoku.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/zenkoku_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/aroom.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/aroom_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/event.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/event_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/group_net.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/group_net_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/bangumi.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/bangumi_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/omoban.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/omoban_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/bs.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/bs_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/radio.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/radio_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/kodomo.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/kodomo_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/gogaku.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/gogaku_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/kurashi2.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/kurashi2_over.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_01.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_02.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_03.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_04.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_05.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_06.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_07.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_08.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_09.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_10.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_11.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mf2_12.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_01.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_02.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_03.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_04.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_05.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_06.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_07.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_08.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_09.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_10.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_11.gif',
					 'http://www3.nhk.or.jp/toppage/head0603/img/mn2_12.gif');
}