Javascript Note: date object and Operation Method

// Constructor new date (milliseconds) // new date (year, month, day, hours, minutes, seconds, MS) // PS: month parameter range: 0-11 // key point: the date object is converted to a string in the specified format, and the string is converted to a date // eg: new date (datestring) // new date ("yyyy-mm-dd hh: mm: SS") // new date ("yyyy/mm/dd hh: mm: SS ") it can also be mm/DD/YYYY // new date ("YYYY mm dd hh: mm: SS"). The order of year, month, and day cannot be changed. Chrome Firefox is normal. // new date ("YYYY, mm, dd hh: mm: SS ") the order of year, month, and day cannot be changed. Chrome Firefox is normal. // new date (" Month day, year hh: mm: SS ") the month can be abbreviated in English, comma can be replaced by space, and the order of year, month, and day can be changed

1 // <! [CDATA [2/** 3 * For date extension, convert date to string 4 * month (M), Day (D), 12 hours (h) in the specified format), 24 hours (H), minute (M), second (s), Week (E), quarter (q) can use 1-2 placeholders 5 * Year (y) you can use 1-4 placeholders. in milliseconds (s), you can only use 1 placeholder (a number ranging from 1 to 3) 6 * eg: 7 * (new date ()). pattern ("yyyy-mm-dd hh: mm: Ss. s ") => 08:09:04. 423 8 * (new date ()). pattern ("yyyy-mm-dd e hh: mm: SS") ==>2009-03-10 20:09:04 9 * (new date ()). pattern ("yyyy-mm-dd EE hh: mm: SS") ==> 08:09:04 Tuesday 10 * (new date ()). pattern ("yyyy-mm-dd EEE hh: mm: SS") ==> 08:09:04 11 * (new date ()). pattern ("yyyy-m-d h: M: S. s ") ==>. 18 12 */13 Date. prototype. format = function (FMT) {14 var o = {15 "m +": This. getmonth () + 1, // month 16 "d +": This. getdate (), // day 17 "H +": This. gethours () % 12 = 0? 12: This. gethours () % 12, // 12 hours 18 "H +": This. gethours (), // 24 hours 19 "m +": This. getminutes (), // minute 20 "s +": This. getseconds (), // second 21 "q +": math. floor (this. getmonth () + 3)/3), // quarter 22 "S": This. getmilliseconds () // millisecond 23}; 24 var week = {25 "0": "\ u65e5", 26 "1": "\ u4e00", 27 "2 ": "\ u4e8c", 28 "3": "\ u4e09", 29 "4": "\ u56db", 30 "5": "\ u4e94", 31 "6 ": "\ u516d" 32}; 33 If (/(Y + )/. test (FMT) {34 FMt = FMT. replace (Regexp. $1, (this. getfullyear () + ""). substr (4-Regexp. $1. length); 35} 36 IF (/(E + )/. test (FMT) {37 FMt = FMT. replace (Regexp. $1, (Regexp. $1. length> 1 )? (Regexp. $1. length> 2? "\ U661f \ u671f": "\ u5468"): "") + week [this. getday () + ""]); 38} 39 for (var k in O) {40 if (New Regexp ("(" + K + ")"). test (FMT) {41 FMt = FMT. replace (Regexp. $1, (Regexp. $1. length = 1 )? (O [k]): ("00" + O [k]). substr ("" + O [k]). length); 42} 43} 44 return FMT; 45} 46 //]>