var tokPat=new RegExp("^month_strict|month|Month|MONTH|yyyy|YYYY|mins|MINS|mon_strict|ampm|AMPM|mon|Mon|MON|min|MIN|dd|DD|mm|MM|yy|YY|hh|HH|ss|SS|m|M|d|D|y|Y|h|H|s|S");
var lowerMonArr={jan:1, feb:2, mar:3, apr:4, may:5, jun:6, jul:7, aug:8, sep:9, oct:10, nov:11, dec:12}
var monPatArr=new Array();
monPatArr['mon_strict']=new RegExp(/jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec/);
monPatArr['Mon']=new RegExp(/Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec/);
monPatArr['MON']=new RegExp(/JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC/);
monPatArr['mon']=new RegExp("jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec",'i');
var monthPatArr=new Array();
monthPatArr['month']=new RegExp(/^january|february|march|april|may|june|july|august|september|october|november|december/i);
monthPatArr['Month']=new RegExp(/^January|February|March|April|May|June|July|August|September|October|November|December/);
monthPatArr['MONTH']=new RegExp(/^JANUARY|FEBRUARY|MARCH|APRIL|MAY|JUNE|JULY|AUGUST|SEPTEMBER|OCTOBER|NOVEMBER|DECEMBER/);
monthPatArr['month_strict']=new RegExp(/^january|february|march|april|may|june|july|august|september|october|november|december/);
var cutoffYear=50;
function FormatToken (token, type) {
this.token=token;
this.type=type;
}
function parseFormatString (formatStr) {
var tokArr=new Array;
var tokInd=0;
var strInd=0;
var foundTok=0;
while (strInd < formatStr.length) {
if (formatStr.charAt(strInd)=="%" &&
(matchArray=formatStr.substr(strInd+1).match(tokPat)) != null) {
strInd+=matchArray[0].length+1;
tokArr[tokInd++]=new FormatToken(matchArray[0],"symbolic");
} else {
if (tokInd>0 && tokArr[tokInd-1].type=="literal") {
tokArr[tokInd-1].token+=formatStr.charAt(strInd++);
}
else {
tokArr[tokInd++]=new FormatToken(formatStr.charAt(strInd++), "literal");
      }
   }
}
return tokArr;
}
 function dateCheck(dateStr,formatStr) {
 var myObj=buildDate(dateStr,formatStr);
 if (typeof myObj=="object") {
 return true;
 } else {
 return false;
 }
 }
function buildDate(dateStr,formatStr) {
var tokArr=parseFormatString(formatStr);
var strInd=0;
var tokInd=0;
var intMonth;
var intDay;
var intYear;
var intHour;
var intMin;
var intSec;
var ampm="";
var strOffset;
var curdate=new Date();
intMonth=curdate.getMonth()+1;
intDay=curdate.getDate();
intYear=curdate.getFullYear();
intHour=0;
intMin=0;
intSec=0;
while (strInd < dateStr.length && tokInd < tokArr.length) {
if (tokArr[tokInd].type=="literal") {
if (dateStr.indexOf(tokArr[tokInd].token,strInd)==strInd) {
strInd+=tokArr[tokInd++].token.length;
continue;
}
else {
return "\"" + dateStr + "\" does not conform to the expected format: " + formatStr;
   }
}
switch (tokArr[tokInd].token) {
case 'm':
case 'M':
case 'd':
case 'D':
case 'h':
case 'H':
case 'min':
case 'MIN':
case 's':
case 'S':
curChar=dateStr.charAt(strInd);
nextChar=dateStr.charAt(strInd+1);
matchArr=dateStr.substr(strInd).match(/^\d{1,2}/);
if (matchArr==null) {
switch (tokArr[tokInd].token.toLowerCase()) {
case 'd': var unit="day"; break;
case 'm': var unit="month"; break;
case 'h': var unit="hour"; break;
case 'min': var unit="minute"; break;
case 's': var unit="second"; break;
}
return "Bad " + unit + " \"" + curChar + "\" or \"" + curChar +
nextChar + "\".";
}
strOffset=matchArr[0].length;
switch (tokArr[tokInd].token.toLowerCase()) {
case 'd': intDay=parseInt(matchArr[0],10); break;
case 'm': intMonth=parseInt(matchArr[0],10); break;
case 'h': intHour=parseInt(matchArr[0],10); break;
case 'min': intMin=parseInt(matchArr[0],10); break;
case 's': intSec=parseInt(matchArr[0],10); break;
}
break;
case 'mm':
case 'MM':
case 'dd':
case 'DD':
case 'hh':
case 'HH':
case 'mins':
case 'MINS':
case 'ss':
case 'SS':
strOffset=2;
matchArr=dateStr.substr(strInd).match(/^\d{2}/);
if (matchArr==null) {
switch (tokArr[tokInd].token.toLowerCase()) {
case 'dd': var unit="day"; break;
case 'mm': var unit="month"; break;
case 'hh': var unit="hour"; break;
case 'mins': var unit="minute"; break;
case 'ss': var unit="second"; break;
}
return "Bad " + unit + " \"" + dateStr.substr(strInd,2) + 
"\".";
}
switch (tokArr[tokInd].token.toLowerCase()) {
case 'dd': intDay=parseInt(matchArr[0],10); break;
case 'mm': intMonth=parseInt(matchArr[0],10); break;
case 'hh': intHour=parseInt(matchArr[0],10); break;
case 'mins': intMin=parseInt(matchArr[0],10); break;
case 'ss': intSec=parseInt(matchArr[0],10); break;
}
break;
case 'y':
case 'Y':
if (dateStr.substr(strInd,4).search(/\d{4}/) != -1) {
intYear=parseInt(dateStr.substr(strInd,4),10);
strOffset=4;
}
else {
if (dateStr.substr(strInd,2).search(/\d{2}/) != -1) {
intYear=parseInt(dateStr.substr(strInd,2),10);
if (intYear>=cutoffYear) {
intYear+=1900;
}
else {
intYear+=2000;
}
strOffset=2;
}
else {
return "Bad year \"" + dateStr.substr(strInd,2) + 
"\". Must be two or four digits.";
   }
}
break;
case 'yy':
case 'YY':
if (dateStr.substr(strInd,2).search(/\d{2}/) != -1) {
intYear=parseInt(dateStr.substr(strInd,2),10);
if (intYear>=cutoffYear) {
intYear+=1900;
}
else {
intYear+=2000;
}
strOffset=2;
} else {
return "Bad year \"" + dateStr.substr(strInd,2) + 
"\". Must be two digits.";
}
break;
case 'yyyy':
case 'YYYY':
if (dateStr.substr(strInd,4).search(/\d{4}/) != -1) {
intYear=parseInt(dateStr.substr(strInd,4),10);
strOffset=4;
}
else {
return "Bad year \"" + dateStr.substr(strInd,4) + 
"\". Must be four digits.";
}
break;
case 'mon':
case 'Mon':
case 'MON':
case 'mon_strict':
monPat=monPatArr[tokArr[tokInd].token];
if (dateStr.substr(strInd,3).search(monPat) != -1) {
intMonth=lowerMonArr[dateStr.substr(strInd,3).toLowerCase()];
}
else {
switch (tokArr[tokInd].token) {
case 'mon_strict': caseStat="lower-case"; break;
case 'Mon': caseStat="mixed-case"; break;
case 'MON': caseStat="upper-case"; break;
case 'mon': caseStat="between Jan and Dec"; break;
}
return "Bad month \"" + dateStr.substr(strInd,3) + 
"\". Must be " + caseStat + ".";
}
strOffset=3;
break;
case 'month':
case 'Month':
case 'MONTH':
case 'month_strict':
monPat=monthPatArr[tokArr[tokInd].token];
matchArray=dateStr.substr(strInd).match(monPat);
if (matchArray==null) {
return "Can't find a month beginning at \"" +
dateStr.substr(strInd) + "\".";
}
intMonth=lowerMonArr[matchArray[0].substr(0,3).toLowerCase()];
strOffset=matchArray[0].length;
break;
case 'ampm':
case 'AMPM':
matchArr=dateStr.substr(strInd).match(/^(am|pm|AM|PM|a\.m\.|p\.m\.|A\.M\.|P\.M\.)/);
if (matchArr==null) {
return "Missing am/pm designation.";
}
if (matchArr[0].substr(0,1).toLowerCase() == "a") {
ampm = "am";
}
else {
ampm = "pm";
}
strOffset = matchArr[0].length;
break;
}
strInd += strOffset;
tokInd++;
}
if (tokInd != tokArr.length || strInd != dateStr.length) {
return "\"" + dateStr + "\" is either missing desired information or has more information than the expected format: " + formatStr;
}
if (intMonth < 1 || intMonth > 12) {
return "Month must be between 1 and 12.";
}
if (intDay < 1 || intDay > 31) {
return "Day must be between 1 and 31.";
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && intDay == 31) {
return "Month "+intMonth+" doesn't have 31 days!";
}
if (intMonth == 2) {
var isleap=(intYear%4==0 && (intYear%100!=0 || intYear%400==0));
if (intDay > 29 || (intDay == 29 && !isleap)) {
return "February " + intYear + " doesn't have " + intDay + 
" days!";
   }
}
if (ampm == "") {
if (intHour < 0 || intHour > 23) {
return "Hour must be between 0 and 23 for military time.";
   }
}
else {
if (intHour < 1|| intHour > 12) {
return "Hour must be between 1 and 12 for standard time.";
   }
}
if (ampm=="am" && intHour==12) {
intHour=0;
}
if (ampm=="pm" && intHour < 12) {
intHour += 12;
}
if (intMin < 0 || intMin > 59) {
return "Minute must be between 0 and 59.";
}
if (intSec < 0 || intSec > 59) {
return "Second must be between 0 and 59.";
}
return new Date(intYear,intMonth-1,intDay,intHour,intMin,intSec);
}
function dateCheck(dateStr,formatStr) {
var myObj = buildDate(dateStr,formatStr);
if (typeof myObj == "object") {
return true;
}
else {
   }
}
//  End -->