jquery time arithmetic, formatted method expansion

/*Function: Date plus n days parameter: N is the number of days returned: N Days after date*/Date.prototype.addDays = Date.prototype.addDays | |function(n) {This.setdate (This.getdate () +n);ReturnThis;}/*function: Date minus n days parameter: N is the number of days returned: N Days after date*/Date.prototype.minusDays = Date.prototype.minusDays | |function(n) {This.setdate (This.getdate ()-n);ReturnThis;}/*Function: Date plus n days parameter: N is the number of days returned: N Days after date*/Date.prototype.getWeek = Date.prototype.getWeek | |function(date) {var n =Date.getday ();var rtnstr = "";Switch(n) {Case 0: {rtnstr = "Sunday";Break; }Case 1: {rtnstr = "Monday";Break; }Case 2: {rtnstr = "Tuesday";Break; }Case 3: {rtnstr = "Wednesday";Break; }Case 4: {rtnstr = "Thursday";Break; }Case 5: {rtnstr = "Friday";Break; }Case 6: {rtnstr = "Saturday";Break; }Default: {rtnstr = "";Break; } }ReturnRtnstr;}/*Function: Converts a string to a Date object parameter: A string returned as a yyyy-mm-dd or dd/mm/yyyy: Date Object Note: Direct instantiation of date objects, such as new date ("2011-04-06") is not supported under IE*/Date.prototype.convertDate =function(date) {var flag =True;var Datearray = Date.split ("-");if (datearray.length! = 3) {Datearray = Date.split ("/");if (datearray.length! = 3) {ReturnNull; } flag =False; }var newdate =NewDate ();If(flag) {//Month starting from 0 newdate.setfullyear (datearray[0], datearray[1]-1, datearray[2]); }Else{newdate.setfullyear (datearray[2], datearray[1]-1, datearray[0]); } newdate.sethours (0, 0, 0);ReturnNewdate;};/*Function: Calculates the difference parameter between two dates: date is a DateTime object flag:ms-milliseconds, S-second, M-Min, H-hour, D-Day, M-month, Y-year return: current date and date two milliseconds/second/minute/hour/day*/Date.prototype.dateDiff =function(date, flag) {var mscount = 1; Date =NewDate (date);Switch(flag) {Case "MS": Mscount = 1;Break;Case "S":This.setmilliseconds (0); Date.setmilliseconds (0); Mscount = 1000;Break;Case "M":This.setseconds (0, 0); Date.setseconds (0, 0); Mscount = 60 * 1000;Break;Case "H":This.setminutes (0, 0, 0); Date.setminutes (0, 0, 0); Mscount = 60 * 60 * 1000;Break;Case "D":This.sethours (0, 0, 0, 0); Date.sethours (0, 0, 0, 0); Mscount = 24 * 60 * 60 * 1000;Break; }var diff =This.gettime ()-Date.gettime ();return Math.floor (diff/Mscount);};/*Function: Format date parameter: formatstr-format string D: Displays the day as a number without leading zeros, such as 1DD: Displays the day as a number with leading zeros, such as 01ddd: Displays the day as an abbreviated form, such as SUNDDDD: Displays the day as the full name, such as Sundaym: Displays the month as a number without leading zeros, as shown in January as 1MM: Displays the month as a number with leading zeros, such as 01MMM: Displays the month as an abbreviated form, such as janmmmm: Displays the month as the full month name, such as januaryyy: Displays the year in two-digit format yyyy: Year in four-digit format h: Displays the hour as a number without leading zeros using a 12-hour system Note | | Usage hh: Displays the hour as a number h with leading zeros using a 12-hour system: Use a 24-hour system to display the hour as a number without leading zeros hh: Displays the hour as a number m with leading zeros using a 24-hour system: Displays the minute as a number with no leading zeros mm: Displays the minute as a number s with leading zeros: Displays the second as a number SS without leading zeros : Displays seconds as a leading zero number L: Displays milliseconds as a number without leading zeros ll: Displays milliseconds as a number with leading zeros TT: Display AM/PMTT: Show am/pm return: date after formatting*/Date.prototype.format =function(FORMATSTR) {var date =This;/*Function: Fill 0 character parameter: value-the string to fill, length-total length return: populated string*/var zeroize =function(value, Length) {if (!Length) {length = 2; } value =NewString (value);for (var i = 0, zeros = "; I < (length-value.length); i++) {zeros + = ' 0 '; }return zeros +Value };return Formatstr.replace (/"[^"]* "|" [^ ']* ' |\b (?:d {1,4}| M{1,4}|yy (?: yy)? | ([HHMSTT]) \1?| [LLZ]) \b/g,Function ($) {Switch ($) {Case ' d ':ReturnDate.getdate ();Case ' DD ':ReturnZeroize (Date.getdate ());Case ' DDD ':return [' Sun ', ' Mon ', ' Tue ', ' Wed ', ' Thr ', ' Fri ', ' Sat '][date.getday ()];Case ' dddd ':return [' Sunday ', ' Monday ', ' Tuesday ', ' Wednesday ', ' Thursday ', ' Friday ', ' Saturday '][date.getday ()];Case ' M ':return Date.getmonth () + 1;Case ' MM ':Return Zeroize (Date.getmonth () + 1); Case ' MMM ': return [' Jan ', ' Feb ', ' Mar ', ' April ', ' may ', ' June ', ' Jul ', '][date.getmonth ', ' Sep ', ' Oct ', ' Nov ', ' Dec ' ()]; Case ' MMMM ': return [' January ', ' February ', ' March ', ' April ', ' may ', ' June ', ' July ', ' August ', ' September ', ' October ', ' No ' Vember ', ' December '][date.getmonth ()]; Case ' yy ': return new String (Date.getfullyear ()). substr (2); Case ' yyyy ': return Date.getfullyear (); Case ' H ': return date.gethours ()% 12 | | 12; Case ' hh ': Return Zeroize (date.gethours ()% 12 | | 12); Case ' H ': return date.gethours (); Case ' HH ': Return Zeroize (Date.gethours ()); Case ' m ': return Date.getminutes (); Case ' mm ': Return Zeroize (Date.getminutes ()); Case ' s ': return Date.getseconds (); Case ' SS ': Return Zeroize (Date.getseconds ()); Case ' l ': return Date.getmilliseconds (); Case ' ll ': Return Zeroize (Date.getmilliseconds ()); Case ' TT ': Return date.gethours () < 12? ' Am ': ' PM '; Case ' TT ': Return date.gethours () < 12? ' AM ': ' PM '; } });}

jquery time arithmetic, formatted method expansion