google.load("feeds", "1");
var getRssFeed = function (_id, _urls, _length) {
	if(!_id || !_urls || (!(_urls instanceof Array)))	return;
	
	this.init = function () {
		var container = document.getElementById(_id);
		for (var e = 0; e < _urls.length; e++) {
			var feed = new google.feeds.Feed(_urls[e]);
			if(_length)	feed.setNumEntries(_length);
			feed.load(function(result) {
				if (!result.error) {
					html = '<h3>' + result.feed.title + '</h3>';
					html += '<ul>';
					for (var i = 0; i < result.feed.entries.length; i++) {
						var entry = result.feed.entries[i];
						var pdate = new Date(entry.publishedDate);
						var Y = pdate.getFullYear();
						var m = pdate.getMonth() + 1;
						m = (m < 10)? '0' + m:m;//月数字を2桁に
						var d = pdate.getDate();
						d = (d < 10)? '0' + d:d;//日数字を2桁に
						var date = Y + '年' + m + '月' + d + '日';
						
						html += '<li>'+ date +'　<a href="' + entry.link + '" target="_blank">' + entry.title + '</a></li>';
					}
					html += '</ul>';
					container.innerHTML += html;
				}
			});
		}
		
	};
	google.setOnLoadCallback(this.init);
};

getRssFeed("feed1", ['http://link4d.xsrv.jp/mrtblog/?feed=rss2'], 4);