Date()関連のメソッド——14桁日付の取得方法
参照ドキュメント：http://www.w3school.com.cn/js/jsref_obj_date.asp
function getSysTimestamp() { var now = new Date(); var date=now.getDate(); var month=now.getMonth()+1; var year=now.getYear(); var timestr; timestr = year; timestr += ((month<10)?"0":"")+month; timestr += ((date<10)?"0":"")+date; var hours = now.getHours(); var minutes = now.getMinutes(); var seconds = now.getSeconds(); var milseconds = now.getMilliseconds(); timestr += ((hours<10)?"0":"")+hours; timestr += ((minutes<10)?"0":"")+minutes; timestr += ((seconds<10)?"0":"")+seconds; timestr += milseconds; return timestr;}