[JS] 날짜형식 포맷

Date.prototype.format = function(f) { if (!this.valueOf()) return " "; var weekName = ["일요일", "월요일", "화요일", "수요일", "목요일", "금요일", "토요일"]; var d = this; return f.replace(/(yyyy|yy|MM|dd|E|hh|mm|ss|a\/p)/gi, function($1) { switch ($1) { case "yyyy": return d.getFullYear(); case "yy": return (d.getFullYear() % 1000).zf(2); case "MM": return (d.getMonth() + 1).zf(2); case "dd": return d.getDate().zf(..