投稿日の表示を曜日付きにする

（デザイン／カスタマイズ／フッタ） 

<script>
var dateTime = document.querySelectorAll('[datetime]');
for (var i = 0; i < dateTime.length; i++){
    dateTime[i].appendChild(DateToWeek(dateTime[i].getAttribute("datetime")));
}
function DateToWeek(day){
    if(typeof day === "undefined"){return ""}
//  day = day.substr(0,10);
    var d = new Date(day);
//  var w = ["Sun","Mon","Tue","Wed","Thu","Fri","Sat"];
    var w = ["(日)","(月)","(火)","(水)","(木)","(金)","(土)"];
    var el = document.createElement("span");
    var str = document.createTextNode(w[d.getDay()]);
    el.setAttribute("class", "date-week");
    el.appendChild(str);
    return el;
}
</script>