function asort(myArray, key){
        return myArray.sort ( function (b1, b2) { return b1[key] > b2[key] ? -1 : 1; } );
}


function createDateString(publishedDate){
       var pdate = new Date(publishedDate);
       var pday = pdate.getDate();
       var pmonth = pdate.getMonth() + 1;
       var pyear = pdate.getFullYear();
       var strdate = pyear + "年" + pmonth + "月" + pday + "日"; 
       return strdate;
}