function retrieveImgFromString(content, amount) {
	var i = 0;
	var startIndex = 0;
	var tagStartIndex = content.indexOf("<img", startIndex);
	var result = new Array(); // store images in an array
	while( (i < amount) && (tagStartIndex != -1) ){
		//tagCloseIndex = content.indexOf(">", tagStartIndex+1);
		srcStartIndex = content.indexOf('src="', tagStartIndex);
		srcCloseIndex = content.indexOf('"', srcStartIndex+5);
		result.push(content.substring(srcStartIndex+5, srcCloseIndex));
		tagStartIndex = content.indexOf("<img", srcStartIndex);
		//alert(result[i]);
		i++;
	}
	return result;
}

function createDateString(publishedDate){
	var pdate = new Date(publishedDate);

	var pday = pdate.getDate();
	var pmonth = pdate.getMonth() + 1;
	var pyear = pdate.getFullYear();
	var phour = pdate.getHours();
	var pminute = pdate.getMinutes();
	var psecond = pdate.getSeconds();
	var strdate = pyear + "年" + pmonth + "月" + pday + "日" ;
	//var strdate = pyear + "年" + pmonth + "月" + pday + "日" + phour + "時" + pminute + "分" + psecond + "秒";

	return strdate;
}