JS Date manipulation function

1 /**2 * Gets the local format string for the current time3 * @returns {String}4  */5DATE.PROTOTYPE.GETLOCALETIMESTR =function(){6     return  This. tolocaletimestring ();7 };8 9 /**Ten * Gets the local format string for the current time, leaving only the number part One * @returns {String} A  */ -DATE.PROTOTYPE.GETPURELOCALETIMESTR =function(){ -     return  This. tolocaletimestring (). Replace (/^\d*/, "); the }; -  - /** - * Get a few seconds at a time + * @param gap number - * @returns {Date} +  */ ADATE.PROTOTYPE.GETGAPSSECONDLOCALETIMESTR =function(GAP) { at     //return new Date (THIS-GAP *); - } -  - /** - * Get a few minutes apart - * @param gap number in * @returns {Date} -  */ toDATE.PROTOTYPE.GETGAPSMINUTELOCALETIMESTR =function(GAP) { +     //return new Date (THIS-GAP *); - }; the /** * * Get the date seven days ago $ * @returns {String}Panax Notoginseng  */ -Date.prototype.getPreSevenDate =function(){ the      This. SetDate ( This. GetDate ()-7); +     return  This. Format ("Yyyy-mm-dd hh:mm:ss"); A }; the /** + * Get dates for a day - * @param {number} day days before/after date $ * @returns {String} $  */ -Date.prototype.getSomeDayDate =function(day) { -      This. SetDate ( This. GetDate () +Day ); the     return  This. Format ("Yyyy-mm-dd hh:mm:ss"); - };Wuyi /** the * Gets the current time (call method: New Date (). Format ("Yyyy-mm-dd hh:mm:ss")) - * @param fmt Wu * @returns {string}/2016-01-01 00:00:00/ -  */ AboutDate.prototype.Format =function(FMT) { $     varn \ { -"m+": This. GetMonth () + 1, -"D+": This. GetDate (), -"H +": This. GetHours (), A"m+": This. getminutes (), +"S+": This. getseconds (), the"q+": Math.floor (( This. GetMonth () + 3)/3), -"S": This. Getmilliseconds () $     }; the     if(/(y+)/. Test (FMT)) theFMT = Fmt.replace (regexp.$1, ( This. getFullYear () + "") the. substr (4-regexp.$1. length)); the      for(varKincho) -         if(NewRegExp ("(" + K + ")"). Test (FMT)) inFMT = Fmt.replace (regexp.$1, (regexp.$1.length = = 1)?(O[k]) the: (("XX" + o[k]). substr ("" +O[k] )); the     returnFMT; About }; the  the /** the * Date Operation related methods +  */ - varMydateutil = { the         /**Bayi * Set Date (0 for today, 1 for yesterday, etc.) the * @param adddaycount the * @returns {string}/2016-01-01/ -          */ -GETDATESTR:function(adddaycount) { the         varDD =NewDate (); theDd.setdate (Dd.getdate () +adddaycount);//get the date adddaycount days the         vary =dd.getfullyear (); the         varm = Dd.getmonth () +1;//Gets the date of the current month -         if(m<10){ them = ' 0 ' +m; the         } the         varD =dd.getdate ();94         if(d<10){ theD = ' 0 ' +D; the         } the         98         returny+ "-" +m+ "-" +D; About     }, -     /**101 * Find another date based on one date102 * @param {} theday:2016-04-20103 * @param {} adddaycount: (-1 is the day before, 1 is the latter, 0 is unchanged, etc.)104 * @return {String} the      */106Finddaybyday:function(theday,adddaycount) {107         varFormatday =NewDate (theday);108Formatday.setdate (Formatday.getdate () +adddaycount);//get the date adddaycount days109         vary =formatday.getfullyear (); the         varm = Formatday.getmonth () +1;//Gets the date of the current month111         if(m<10){ them = ' 0 ' +m;113         } the         varD =formatday.getdate (); the         if(d<10){ theD = ' 0 ' +D;117         }118         119         returny+ "-" +m+ "-" +D; -     },121     /**122 * Returns the number of milliseconds from January 1, 1970 (can be used to compare the time size)123 * @param {} Date format is: Yyyy-mm-dd124      */ theFormattimesfromdate:function(Date) {126         vararr = Date.split ("-");127         varNewdate =NewDate (arr[0],arr[1],arr[2]); -         varResultdate =newdate.gettime ();129         returnresultdate; the     }131}

JS Date manipulation function