//  更新日表示プログラム
//  Copyright(C)2000-2008 品川 高廣

function formatDate(date)
{
	 var y = date.getYear();
	 var m = date.getMonth() + 1;
	 var d = date.getDate();
	 var i = date.getDay();
	 var day = new Array("<FONT color=red>日</FONT>", "月", "火",
	 "水", "木", "金", "<FONT color=blue>土</FONT>");
	 if (y < 2000) y += 1900; /* 2000年問題対応 */
	 return y + "年" + m + "月" + d + "日(" + day[i] + ")";
}

function lastmodified(d)
{
	var now = new Date();
	var last = new Date(d);
	var diff = now.getTime() - last.getTime();
	var when = "更新日：" + formatDate(last);

	if (diff < 7200000)	// 120*60*1000 : 100分
		str2 = (Math.floor(diff / 60000)) + "分";
	else if (diff < 172800000)	// 48*60*60*1000 : 48時間
		str2 = (Math.floor(diff / 3600000)) + "時間";
	else
		str2 = (Math.floor(diff / 86400000)) + "日";
	since = "(" + str2 + "前)";
	return when;
//	return when + since;
}

function today()
{
	var now = new Date();
	return formatDate(now);
}