https://www.clubsofdovemountain.com/common/scripts/validatedate1.js

1/* This is a date validator 	*/
2
3function checkdate(objName) 
4{
5	var datefield = objName;
6	if (isDate(objName.value) == false) 
7	{
8		datefield.value = "";
9		alert("That date is invalid.  Please try again.");
10		datefield.focus();
11		return false;
12	}
13	else 
14	{
15		return true;
16	}
17}
18
19function isDate(DateToCheck)
20{
21	if(DateToCheck=="")
22	{
23		return true;
24	}
25	var m_strDate = FormatDate(DateToCheck);
26	if(m_strDate=="")
27	{
28		return false;
29	}
30	
31	var m_arrDate = m_strDate.split("/");
32	var m_DAY = m_arrDate[0];
33	var m_MONTH = m_arrDate[1];
34	var m_YEAR = m_arrDate[2];
35
36	if(m_YEAR.length > 4)
37	{
38		return false;
39	}
40	
41	m_strDate = m_MONTH + "/" + m_DAY + "/" + m_YEAR;
42	var testDate=new Date(m_strDate);
43	if (testDate.getMonth()+1==m_MONTH)
44	{
45		return true;
46	} 
47	else
48	{
49		return false;
50	}
51}
52
53function FormatDate(DateToFormat,FormatAs){
54if(DateToFormat==""){return"";}
55if(!FormatAs){FormatAs="dd/mm/yyyy";}
56
57var strReturnDate;
58FormatAs = FormatAs.toLowerCase();
59DateToFormat = DateToFormat.toLowerCase();
60var arrDate
61var arrMonths = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
62var strMONTH;
63var Separator;
64
65while(DateToFormat.indexOf("st")>-1){
66DateToFormat = DateToFormat.replace("st","");
67}
68
69while(DateToFormat.indexOf("nd")>-1){
70DateToFormat = DateToFormat.replace("nd","");
71}
72
73while(DateToFormat.indexOf("rd")>-1){
74DateToFormat = DateToFormat.replace("rd","");
75}
76
77while(DateToFormat.indexOf("th")>-1){
78DateToFormat = DateToFormat.replace("th","");
79}
80
81if(DateToFormat.indexOf(".")>-1){
82Separator = ".";
83}
84
85if(DateToFormat.indexOf("-")>-1){
86Separator = "-";
87}
88
89
90if(DateToFormat.indexOf("/")>-1){
91Separator = "/";
92}
93
94if(DateToFormat.indexOf(" ")>-1){
95Separator = " ";
96}
97
98arrDate = DateToFormat.split(Separator);
99DateToFormat = "";
100	for(var iSD = 0;iSD < arrDate.length;iSD++){
101		if(arrDate[iSD]!=""){
102		DateToFormat += arrDate[iSD] + Separator;
103		}
104	}
105DateToFormat = DateToFormat.substring(0,DateToFormat.length-1);
106arrDate = DateToFormat.split(Separator);
107
108if(arrDate.length < 3){
109return "";
110}
111
112var DAY = arrDate[0];
113var MONTH = arrDate[1];
114var YEAR = arrDate[2];
115
116
117
118
119if(parseFloat(arrDate[1]) > 12){
120DAY = arrDate[1];
121MONTH = arrDate[0];
122}
123
124if(parseFloat(DAY) && DAY.toString().length==4){
125YEAR = arrDate[0];
126DAY = arrDate[2];
127MONTH = arrDate[1];
128}
129
130
131for(var iSD = 0;iSD < arrMonths.length;iSD++){
132var ShortMonth = arrMonths[iSD].substring(0,3).toLowerCase();
133var MonthPosition = DateToFormat.indexOf(ShortMonth);
134	if(MonthPosition > -1){
135	MONTH = iSD + 1;
136		if(MonthPosition == 0){
137		DAY = arrDate[1];
138		YEAR = arrDate[2];
139		}
140	break;
141	}
142}
143
144var strTemp = YEAR.toString();
145if(strTemp.length==2){
146
147	if(parseFloat(YEAR)>40){
148	YEAR = "19" + YEAR;
149	}
150	else{
151	YEAR = "20" + YEAR;
152	}
153
154}
155
156
157	if(parseInt(MONTH)< 10 && MONTH.toString().length < 2){
158	MONTH = "0" + MONTH;
159	}
160	if(parseInt(DAY)< 10 && DAY.toString().length < 2){
161	DAY = "0" + DAY;
162	}
163	switch (FormatAs){
164	case "dd/mm/yyyy":
165	return DAY + "/" + MONTH + "/" + YEAR;
166	case "mm/dd/yyyy":
167	return MONTH + "/" + DAY + "/" + YEAR;
168	case "dd/mmm/yyyy":
169	return DAY + " " + arrMonths[MONTH -1].substring(0,3) + " " + YEAR;
170	case "mmm/dd/yyyy":
171	return arrMonths[MONTH -1].substring(0,3) + " " + DAY + " " + YEAR;
172	case "dd/mmmm/yyyy":
173	return DAY + " " + arrMonths[MONTH -1] + " " + YEAR;	
174	case "mmmm/dd/yyyy":
175	return arrMonths[MONTH -1] + " " + DAY + " " + YEAR;
176	}
177
178return DAY + "/" + strMONTH + "/" + YEAR;;
179
180} //End Function
181
182
183
184
185
186function checkTime(objName) 
187{
188
189    var timefield = objName;
190    var timeValue = objName.value;
191
192    var noSpace = "";
193    var regexTime = /^(10|11|12|[1-9]):[0-5][0-9] pm|am$/
194
195    if (timeValue.length > 0) {
196
197        timeValue = timeValue.toLowerCase().replace(/\./g, '');  //remove any periods
198        timeValue = timeValue.replace('p', ' p');                //put a space before pm
199        timeValue = timeValue.replace('a', ' a');                //put a space before am
200        timeValue = timeValue.replace(/ {1,}/g, ' ');

200           //make all spaces single spaces
201
202        //if no colon assume top of the hour and add :00  
203        if (timeValue.indexOf(':') < 0) {
204
205                var timeSplitArr = timeValue.split(' ');
206                timeSplitArr[0] = timeSplitArr[0] + ':00';
207
208                if (timeValue.indexOf(' ') > 0) {
209                    timeValue = timeSplitArr[0] + ' ' + timeSplitArr[1]
210                } else {
211                    timeValue = timeSplitArr[0]
212                }
213        }
214
215        //replace current time with fixed time before check
216        timefield.value = timeValue;
217
218        if (!regexTime.test(timeValue)) {
219            alert("That time is invalid.  Please try again (hh:mm am/pm).");
220            return false;
221        }
222
223    }
224
225	
226	if (IsValidTime(timeValue) == false)
227	{
228		alert("That time is invalid.  Please try again (hh:mm:ss am/pm).");
229		return false;
230	}
231	else
232	{
233		return true;
234	}
235}
236
237function chkdate(objName) {
238
239	var strDatestyle = "US"; //United States date style
240	//var strDatestyle = "EU";  //European date style
241	var strDate;
242	var strDateArray;
243	var strDay;
244	var strMonth;
245	var strYear;
246	var intday;
247	var intMonth;
248	var intYear;
249	var booFound = false;
250	var datefield = objName;
251	var strSeparatorArray = new Array("-"," ","/",".");
252	var intElementNr;
253	var err = 0;
254
255	var vDate = new Date();
256
257	var strMonthArray = new Array(12);
258	strMonthArray[0] = "Jan";
259	strMonthArray[1] = "Feb";
260	strMonthArray[2] = "Mar";
261	strMonthArray[3] = "Apr";
262	strMonthArray[4] = "May";
263	strMonthArray[5] = "Jun";
264	strMonthArray[6] = "Jul";
265	strMonthArray[7] = "Aug";
266	strMonthArray[8] = "Sep";
267	strMonthArray[9] = "Oct";
268	strMonthArray[10] = "Nov";
269	strMonthArray[11] = "Dec";
270
271	strDate = datefield.value;
272	if (strDate.length < 1) 
273	{
274		return true;
275	}
276
277	for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) 
278	{
279		if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) 
280		{
281			strDateArray = strDate.split(strSeparatorArray[intElementNr]);
282			if (strDateArray.length != 3) 
283			{
284				err = 1;
285				return false;
286			}
287			else 
288			{
289				strDay = strDateArray[0];
290				strMonth = strDateArray[1];
291				strYear = strDateArray[2];
292			}
293			booFound = true;
294		}
295	}
296	if (booFound == false) 
297	{
298		if (strDate.length>5) 
299		{
300			strDay = strDate.substr(0, 2);
301			strMonth = strDate.substr(2, 2);
302			strYear = strDate.substr(4);
303		}
304	}
305	if (strYear.length == 2) 
306	{
307		intYear = parseInt(strYear, 10);
308		if (isNaN(intYear)) 
309		{
310			//strYear = vDate.getFullYear();
311		}
312		else
313		{
314			if (intYear > 30)
315			{	strYear = '19' + strYear;	}
316			else
317			{	strYear = '20' + strYear;	}
318		}
319	}
320	
321	// US style
322	if (strDatestyle == "US") 
323	{
324		strTemp = strDay;
325		strDay = strMonth;
326		strMonth = strTemp;
327	}
328	
329	intday = parseInt(strDay, 10);
330	if (isNaN(intday)) 
331	{
332		err = 2;
333		return false;
334	}
335
336	intMonth = parseInt(strMonth, 10);
337	if (isNaN(intMonth)) 
338	{
339		for (i = 0;i<12;i++) 
340		{
341			if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) 
342			{
343				intMonth = i+1;
344				strMonth = strMonthArray[i];
345				i = 12;
346			}
347		}
348		if (isNaN(intMonth)) 
349		{
350			err = 3;
351			return false;
352		}
353	}
354	intYear = parseInt(strYear, 10);
355	if (isNaN(intYear)) 
356	{
357		err = 4;
358		return false;
359	}
360	if (intYear < 1500)
361	{
362		err = 11;
363		return false;
364	}
365	
366	if (intMonth>12 || intMonth<1) 
367	{
368		err = 5;
369		return false;
370	}
371	if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) 
372	{
373		err = 6;
374		return false;
375	}
376	if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) 
377	{
378		err = 7;
379		return false;
380	}
381	if (intMonth == 2) 
382	{
383		if (intday < 1) 
384		{
385			err = 8;
386			return false;
387		}
388		if (LeapYear(intYear) == true) 
389		{
390			if (intday > 29) 
391			{
392				err = 9;
393				return false;
394			}
395		}
396		else 
397		{
398			if (intday > 28) 
399			{
400				err = 10;
401				return false;
402			}
403		}
404	}
405	if (strDatestyle == "US") 
406	{
407		// datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
408		datefield.value = intMonth + "/" + intday+"/" + strYear;
409	}
410	else 
411	{
412		datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;
413	}
414	return true;
415}
416
417function LeapYear(intYear) 
418{
419	if (intYear % 100 == 0) 
420	{
421		if (intYear % 400 == 0) { return true; }
422	}
423	else 
424	{
425		if ((intYear % 4) == 0) { return true; }
426	}
427	return false;
428}
429
430function doDateCheck(from, to) 
431{
432	if (Date.parse(from.value) <= Date.parse(to.value)) 
433	{
434		alert("The dates are valid.");
435	}
436	else 
437	{
438		if (from.value == "" || to.value == "") 
439			alert("Both dates must be entered.");
440		else 
441			alert("To date must occur after the from date.");
442	}
443}
444function doCompareDates(from,to)
445{
446	if (Date.parse(from) < Date.parse(to)) 
447	{	return true;	}
448	else
449	{	return false;	}
450}
451
452function doCompareDatesEqual(from,to)
453{
454	if (Date.parse(from) <= Date.parse(to)) 
455	{	return true;	}
456	else
457	{	return false;	}
458}
459
460function IsValidTime(timeStr) 
461{

462	// Checks if time is in HH:MM:SS AM/PM format.
463	// The seconds and AM/PM are optional.
464
465	var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;
466
467	if (timeStr.length < 1) 
468	{
469		return true;
470	}
471
472	var timeVal = timeStr.toLowerCase();
473	var tmpChar = timeVal.charAt(timeVal.length-1);
474	
475	if (tmpChar == "a" || tmpChar == "p")
476	{
477		if (tmpChar.indexOf("m")<0)
478		{
479			timeVal = timeVal + "m"
480		}
481	}	
482		
483	var matchArray = timeVal.match(timePat);
484
485
486	if (matchArray == null) 
487	{
488		// alert("Time is not in a valid format.");
489		return false;
490	}
491
492	hour = matchArray[1];
493	minute = matchArray[2];
494	second = matchArray[4];
495	ampm = matchArray[6];
496
497	if (second=="") { second = null; }
498	if (ampm=="") { ampm = null }
499
500	if (hour < 0  || hour > 23) 
501	{
502		// alert("Hour must be between 1 and 12. (or 0 and 23 for military time)");
503		return false;
504	}
505
506	if (hour <= 12 && ampm == null) 
507	{
508		ampm = "am"
509	}
510
511	if  (hour > 12 && ampm != null) 
512	{
513		// alert("You can't specify AM or PM for military time.");
514		return false;
515	}
516
517	if (minute<0 || minute > 59) 
518	{
519		// alert ("Minute must be between 0 and 59.");
520		return false;
521	}
522	
523	if (second != null && (second < 0 || second > 59)) 
524	{
525		// alert ("Second must be between 0 and 59.");
526		return false;
527	}
528
529	return true;
530
531}
532
533