Date.prototype.isLeapYear?判斷閏年
Date.prototype.Format?日期格式化
Date.prototype.DateAdd?日期計算
Date.prototype.DateDiff?比較日期差
Date.prototype.toString?日期轉字符串
Date.prototype.toArray?日期分割為數組
Date.prototype.DatePart?取日期的部分信息
Date.prototype.MaxDayOfDate?取日期所在月的最大天數
Date.prototype.WeekNumOfYear?判斷日期所在年的第幾周
StringToDate?字符串轉日期型
IsValidDate?驗證日期有效性
CheckDateTime?完整日期時間檢查
daysBetween?日期天數差

1. //---------------------------------------------------??
2. //?判斷閏年??
3. //---------------------------------------------------??
4. Date.prototype.isLeapYear?=?function()???
5. {???
6. ????return?(0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));???
7. }???
8. ??
9. //---------------------------------------------------??
10. //?日期格式化??
11. //?格式?YYYY/yyyy/YY/yy?表示年份??
12. //?MM/M?月份??
13. //?W/w?星期??
14. //?dd/DD/d/D?日期??
15. //?hh/HH/h/H?時間??
16. //?mm/m?分鐘??
17. //?ss/SS/s/S?秒??
18. //---------------------------------------------------??
19. Date.prototype.Format?=?function(formatStr)???
20. {???
21. ????var?str?=?formatStr;???
22. ????var?Week?=?['日','一','二','三','四','五','六'];??
23. ??
24. ????str=str.replace(/yyyy|YYYY/,this.getFullYear());???
25. ????str=str.replace(/yy|YY/,(this.getYear()?%?100)>9?(this.getYear()?%?100).toString():'0'?+?(this.getYear()?%?100));???
26. ??
27. ????str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0'?+?this.getMonth());???
28. ????str=str.replace(/M/g,this.getMonth());???
29. ??
30. ????str=str.replace(/w|W/g,Week[this.getDay()]);???
31. ??
32. ????str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0'?+?this.getDate());???
33. ????str=str.replace(/d|D/g,this.getDate());???
34. ??
35. ????str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0'?+?this.getHours());???
36. ????str=str.replace(/h|H/g,this.getHours());???
37. ????str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0'?+?this.getMinutes());???
38. ????str=str.replace(/m/g,this.getMinutes());???
39. ??
40. ????str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0'?+?this.getSeconds());???
41. ????str=str.replace(/s|S/g,this.getSeconds());???
42. ??
43. ????return?str;???
44. }???
45. ??
46. //+---------------------------------------------------??
47. //|?求兩個時間的天數差?日期格式為?YYYY-MM-dd???
48. //+---------------------------------------------------??
49. function?daysBetween(DateOne,DateTwo)??
50. {???
51. ????var?OneMonth?=?DateOne.substring(5,DateOne.lastIndexOf?('-'));??
52. ????var?OneDay?=?DateOne.substring(DateOne.length,DateOne.lastIndexOf?('-')+1);??
53. ????var?OneYear?=?DateOne.substring(0,DateOne.indexOf?('-'));??
54. ??
55. ????var?TwoMonth?=?DateTwo.substring(5,DateTwo.lastIndexOf?('-'));??
56. ????var?TwoDay?=?DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf?('-')+1);??
57. ????var?TwoYear?=?DateTwo.substring(0,DateTwo.indexOf?('-'));??
58. ??
59. ????var?cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)-?Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);???
60. ????return?Math.abs(cha);??
61. }??
62. ??
63. ??
64. //+---------------------------------------------------??
65. //|?日期計算??
66. //+---------------------------------------------------??
67. Date.prototype.DateAdd?=?function(strInterval,?Number)?{???
68. ????var?dtTmp?=?this;??
69. ????switch?(strInterval)?{???
70. ????????case?'s'?:return?new?Date(Date.parse(dtTmp)?+?(1000?*?Number));??
71. ????????case?'n'?:return?new?Date(Date.parse(dtTmp)?+?(60000?*?Number));??
72. ????????case?'h'?:return?new?Date(Date.parse(dtTmp)?+?(3600000?*?Number));??
73. ????????case?'d'?:return?new?Date(Date.parse(dtTmp)?+?(86400000?*?Number));??
74. ????????case?'w'?:return?new?Date(Date.parse(dtTmp)?+?((86400000?*?7)?*?Number));??
75. ????????case?'q'?:return?new?Date(dtTmp.getFullYear(),?(dtTmp.getMonth())?+?Number*3,?dtTmp.getDate(),?dtTmp.getHours(),?dtTmp.getMinutes(),?dtTmp.getSeconds());??
76. ????????case?'m'?:return?new?Date(dtTmp.getFullYear(),?(dtTmp.getMonth())?+?Number,?dtTmp.getDate(),?dtTmp.getHours(),?dtTmp.getMinutes(),?dtTmp.getSeconds());??
77. ????????case?'y'?:return?new?Date((dtTmp.getFullYear()?+?Number),?dtTmp.getMonth(),?dtTmp.getDate(),?dtTmp.getHours(),?dtTmp.getMinutes(),?dtTmp.getSeconds());??
78. ????}??
79. }??
80. ??
81. //+---------------------------------------------------??
82. //|?比較日期差?dtEnd?格式為日期型或者?有效日期格式字符串??
83. //+---------------------------------------------------??
84. Date.prototype.DateDiff?=?function(strInterval,?dtEnd)?{???
85. ????var?dtStart?=?this;??
86. ????if?(typeof?dtEnd?==?'string'?)//如果是字符串轉換為日期型??
87. ????{???
88. ????????dtEnd?=?StringToDate(dtEnd);??
89. ????}??
90. ????switch?(strInterval)?{???
91. ????????case?'s'?:return?parseInt((dtEnd?-?dtStart)?/?1000);??
92. ????????case?'n'?:return?parseInt((dtEnd?-?dtStart)?/?60000);??
93. ????????case?'h'?:return?parseInt((dtEnd?-?dtStart)?/?3600000);??
94. ????????case?'d'?:return?parseInt((dtEnd?-?dtStart)?/?86400000);??
95. ????????case?'w'?:return?parseInt((dtEnd?-?dtStart)?/?(86400000?*?7));??
96. ????????case?'m'?:return?(dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12)?-?(dtStart.getMonth()+1);??
97. ????????case?'y'?:return?dtEnd.getFullYear()?-?dtStart.getFullYear();??
98. ????}??
99. }??
100. ??
101. //+---------------------------------------------------??
102. //|?日期輸出字符串，重載了系統的toString方法??
103. //+---------------------------------------------------??
104. Date.prototype.toString?=?function(showWeek)??
105. {???
106. ????var?myDate=?this;??
107. ????var?str?=?myDate.toLocaleDateString();??
108. ????if?(showWeek)??
109. ????{???
110. ????????var?Week?=?['日','一','二','三','四','五','六'];??
111. ????????str?+=?'?星期'?+?Week[myDate.getDay()];??
112. ????}??
113. ????return?str;??
114. }??
115. ??
116. //+---------------------------------------------------??
117. //|?日期合法性驗證??
118. //|?格式為：YYYY-MM-DD或YYYY/MM/DD??
119. //+---------------------------------------------------??
120. function?IsValidDate(DateStr)???
121. {???
122. ????var?sDate=DateStr.replace(/(^\s+|\s+$)/g,'');?//去兩邊空格;???
123. ????if(sDate=='')?return?true;???
124. ????//如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換為''???
125. ????//數據庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數據庫會自動轉換為YYYY-MM-DD格式???
126. ????var?s?=?sDate.replace(/[\d]{?4,4?}[\-/]{?1?}[\d]{?1,2?}[\-/]{?1?}[\d]{?1,2?}/g,'');???
127. ????if?(s=='')?//說明格式滿足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D???
128. ????{???
129. ????????var?t=new?Date(sDate.replace(/\-/g,'/'));???
130. ????????var?ar?=?sDate.split(/[-/:]/);???
131. ????????if(ar[0]?!=?t.getYear()?||?ar[1]?!=?t.getMonth()+1?||?ar[2]?!=?t.getDate())???
132. ????????{???
133. ????????????//alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');???
134. ????????????return?false;???
135. ????????}???
136. ????}???
137. ????else???
138. ????{???
139. ????????//alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');???
140. ????????return?false;???
141. ????}???
142. ????return?true;???
143. }???
144. ??
145. //+---------------------------------------------------??
146. //|?日期時間檢查??
147. //|?格式為：YYYY-MM-DD?HH:MM:SS??
148. //+---------------------------------------------------??
149. function?CheckDateTime(str)??
150. {???
151. ????var?reg?=?/^(\d+)-(\d{?1,2?})-(\d{?1,2?})?(\d{?1,2?}):(\d{?1,2?}):(\d{?1,2?})$/;???
152. ????var?r?=?str.match(reg);???
153. ????if(r==null)return?false;???
154. ????r[2]=r[2]-1;???
155. ????var?d=?new?Date(r[1],r[2],r[3],r[4],r[5],r[6]);???
156. ????if(d.getFullYear()!=r[1])return?false;???
157. ????if(d.getMonth()!=r[2])return?false;???
158. ????if(d.getDate()!=r[3])return?false;???
159. ????if(d.getHours()!=r[4])return?false;???
160. ????if(d.getMinutes()!=r[5])return?false;???
161. ????if(d.getSeconds()!=r[6])return?false;???
162. ????return?true;???
163. }???
164. ??
165. //+---------------------------------------------------??
166. //|?把日期分割成數組??
167. //+---------------------------------------------------??
168. Date.prototype.toArray?=?function()??
169. {???
170. ????var?myDate?=?this;??
171. ????var?myArray?=?Array();??
172. ????myArray[0]?=?myDate.getFullYear();??
173. ????myArray[1]?=?myDate.getMonth();??
174. ????myArray[2]?=?myDate.getDate();??
175. ????myArray[3]?=?myDate.getHours();??
176. ????myArray[4]?=?myDate.getMinutes();??
177. ????myArray[5]?=?myDate.getSeconds();??
178. ????return?myArray;??
179. }??
180. ??
181. //+---------------------------------------------------??
182. //|?取得日期數據信息??
183. //|?參數?interval?表示數據類型??
184. //|?y?年?m月?d日?w星期?ww周?h時?n分?s秒??
185. //+---------------------------------------------------??
186. Date.prototype.DatePart?=?function(interval)??
187. {???
188. ????var?myDate?=?this;??
189. ????var?partStr='';??
190. ????var?Week?=?['日','一','二','三','四','五','六'];??
191. ????switch?(interval)??
192. ????{???
193. ????????case?'y'?:partStr?=?myDate.getFullYear();break;??
194. ????????case?'m'?:partStr?=?myDate.getMonth()+1;break;??
195. ????????case?'d'?:partStr?=?myDate.getDate();break;??
196. ????????case?'w'?:partStr?=?Week[myDate.getDay()];break;??
197. ????????case?'ww'?:partStr?=?myDate.WeekNumOfYear();break;??
198. ????????case?'h'?:partStr?=?myDate.getHours();break;??
199. ????????case?'n'?:partStr?=?myDate.getMinutes();break;??
200. ????????case?'s'?:partStr?=?myDate.getSeconds();break;??
201. ????}??
202. ????return?partStr;??
203. }??
204. ??
205. //+---------------------------------------------------??
206. //|?取得當前日期所在月的最大天數??
207. //+---------------------------------------------------??
208. Date.prototype.MaxDayOfDate?=?function()??
209. {???
210. ????var?myDate?=?this;??
211. ????var?ary?=?myDate.toArray();??
212. ????var?date1?=?(new?Date(ary[0],ary[1]+1,1));??
213. ????var?date2?=?date1.dateAdd(1,'m',1);??
214. ????var?result?=?dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'));??
215. ????return?result;??
216. }??
217. ??
218. //+---------------------------------------------------??
219. //|?取得當前日期所在周是一年中的第幾周??
220. //+---------------------------------------------------??
221. Date.prototype.WeekNumOfYear?=?function()??
222. {???
223. ????var?myDate?=?this;??
224. ????var?ary?=?myDate.toArray();??
225. ????var?year?=?ary[0];??
226. ????var?month?=?ary[1]+1;??
227. ????var?day?=?ary[2];??
228. ????document.write('<?script?language=VBScript\>?\n');??
229. ????document.write('myDate?=?DateValue(''+month+'-'+day+'-'+year+'')?\n');??
230. ????document.write('result?=?DatePart('ww',?myDate)?\n');??
231. ????document.write('?\n');??
232. ????return?result;??
233. }??
234. ??
235. //+---------------------------------------------------??
236. //|?字符串轉成日期類型???
237. //|?格式?MM/dd/YYYY?MM-dd-YYYY?YYYY/MM/dd?YYYY-MM-dd??
238. //+---------------------------------------------------??
239. function?StringToDate(DateStr)??
240. {???
241. ??
242. ????var?converted?=?Date.parse(DateStr);??
243. ????var?myDate?=?new?Date(converted);??
244. ????if?(isNaN(myDate))??
245. ????{???
246. ????????//var?delimCahar?=?DateStr.indexOf('/')!=-1?'/':'-';??
247. ????????var?arys=?DateStr.split('-');??
248. ????????myDate?=?new?Date(arys[0],--arys[1],arys[2]);??
249. ????}??
250. ????return?myDate;??
251. }??