[JS] ISO8601 to YYYY-MM-DD hh:mm:ss convert function

utils.js

/*
    paran_son@outlook.com
    
    INPUT FORMAT EXAMPLE: 2013-07-16T19:00:00Z
    OUTPUT FORMAT EXAMPLE: 2013-07-76 19:00:00
    
*/
datetimeConvert(_iso8601_datetime) {
        if (_iso8601_datetime == null) {
          return "";
        }
        if (_iso8601_datetime.indexOf("+") != -1){
            _iso8601_datetime = _iso8601_datetime.split("+")
            _iso8601_datetime = _iso8601_datetime[0]
        }
        var date = new Date(_iso8601_datetime);
        var year = date.getFullYear();
        var month = date.getMonth()+1;
        var hour = date.getHours();
        var min = date.getMinutes();
        var sec = date.getSeconds();
        var dt = date.getDate();

        if (dt < 10) {
        dt = '0' + dt;
        }
        if (month < 10) {
        month = '0' + month;
        }
        if (hour < 10) {
            hour = '0' + hour;
        }
        if (min < 10) {
            min = '0' + min;
        }
        if (sec < 10){
            sec = '0' + sec;
        }
        return (year+'-' + month + '-'+dt +" "+hour+":"+min+":"+sec);
      }