regular - Javascript: cómo validar las fechas en el formato MM-DD-YYYY?

validar fecha javascript expresion regular

Question

Vi una posible respuesta aquí, pero fue por YYYY-MM-DD: validación de fecha de JavaScript

Modifiqué el código de código anterior para MM-DD-YYYY así, pero todavía no puedo hacer que funcione:

String.prototype.isValidDate = function() 
{
     var IsoDateRe = new RegExp("^([0-9]{2})-([0-9]{2})-([0-9]{4})$");
     var matches = IsoDateRe.exec(this);
     if (!matches) return false;
     var composedDate = new Date(matches[3], (matches[1] - 1), matches[2]);
     return ((composedDate.getMonth() == (matches[1] - 1)) &&
      (composedDate.getDate() == matches[2]) &&
      (composedDate.getFullYear() == matches[3]));
}

¿Cómo puedo hacer que el código anterior funcione para MM-DD-YYYY y mejor aún MM / DD / YYYY?

Gracias.

Answer 1

¿Qué no está trabajando al respecto? aquí hay una versión probada:

String.prototype.isValidDate = function()   {

    var match   =   this.match(/^([0-9]{2})//([0-9]{2})//([0-9]{4})$/);
    var test    =   new Date(match[3], match[1] - 1, match[2]);
    return (
        (test.getMonth() == match[1] - 1) &&
        (test.getDate() == match[2]) &&
        (test.getFullYear() == match[3])
    );
}

var date = ''12/08/1984''; // Date() is ''Sat Dec 08 1984 00:00:00 GMT-0800 (PST)''
alert(date.isValidDate() ); // true

Answer 2

¿Qué tal validar las fechas en formato de fecha "CUALQUIERA"? He estado usando la biblioteca DateJS y añadiéndola a formularios existentes para garantizar que obtenga fechas y horas válidas formateadas de la manera que quiero. El usuario puede incluso ingresar cosas como "ahora" y "mañana" y se convertirá en una fecha válida.

Aquí está la biblioteca de dateJS: http://www.datejs.com/

y aquí hay un consejo de jQuery que escribí: http://www.ssmedia.com/utilities/jquery/index.cfm/datejs.htm

Answer 3

DateFormat = DD.MM.YYYY o DMYYYY

function dateValidate(val){ 
var dateStr = val.split(''.''); 
  var date = new Date(dateStr[2], dateStr[1]-1, dateStr[0]); 
  if(date.getDate() == dateStr[0] && date.getMonth()+1 == dateStr[1] && date.getFullYear() == dateStr[2])
  { return date; }
  else{ return ''NotValid'';} 
}

Answer 4

Esta función validará la fecha para ver si es correcta o si está en el formato adecuado de: DD / MM / YYYY.

function isValidDate(date)
{
    var matches = /^(/d{2})[-//](/d{2})[-//](/d{4})$/.exec(date);
    if (matches == null) return false;
    var d = matches[1];
    var m = matches[2]-1;
    var y = matches[3];
    var composedDate = new Date(y, m, d);
    return composedDate.getDate() == d &&
           composedDate.getMonth() == m &&
           composedDate.getFullYear() == y;
}
console.log(isValidDate(''10-12-1961''));
console.log(isValidDate(''12/11/1961''));
console.log(isValidDate(''02-11-1961''));
console.log(isValidDate(''12/01/1961''));
console.log(isValidDate(''13-11-1961''));
console.log(isValidDate(''11-31-1961''));
console.log(isValidDate(''11-31-1061''));

Answer 5

Esto es para validar la cadena de fecha en formato dd.mm.yyyy. Es fácil de personalizar. Solo necesita ajustar pos1 y pos2 en isValidDate ().

var dtCh = "."; var minYear = 1900;

function isInteger(s){
    var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
    var i;
    var returnString = "";
    // Search through string''s characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
    for (var i = 1; i <= n; i++) {
        this[i] = 31;
        if (i==4 || i==6 || i==9 || i==11) {
            this[i] = 30;
        }
        if (i==2) {
            this[i] = 29;
        }
   } 
   return this;
}

function isValidDate(dtStr){
    var daysInMonth = DaysArray(12);
    var pos1=dtStr.indexOf(dtCh);
    var pos2=dtStr.indexOf(dtCh,pos1+1);
    var strDay=dtStr.substring(0,pos1);
    var strMonth=dtStr.substring(pos1+1,pos2);
    var strYear=dtStr.substring(pos2+1);
    strYr=strYear;
    if (strDay.charAt(0)=="0" && strDay.length>1) 
        strDay=strDay.substring(1);
    if (strMonth.charAt(0)=="0" && strMonth.length>1) 
        strMonth=strMonth.substring(1);
    for (var i = 1; i <= 3; i++) {
        if (strYr.charAt(0)=="0" && strYr.length>1) 
            strYr=strYr.substring(1);
    }
    month=parseInt(strMonth);
    day=parseInt(strDay);
    year=parseInt(strYr);
    if (pos1==-1 || pos2==-1){
        alert("The date format should be : dd.mm.yyyy");
        return false;
    }
    if (strMonth.length<1 || month<1 || month>12){
        alert("Please enter a valid month");
        return false;
    }
    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
        alert("Please enter a valid day");
        return false;
    }
    if (strYear.length != 4 || year==0 || year<minYear){
        alert("Please enter a valid 4 digit year after "+minYear);
        return false;
    }
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
        alert("Please enter a valid date");
        return false;
    }
    return true;
}

Answer 6

Manera simple de resolver

var day = document.getElementById("DayTextBox").value;

var regExp = /^([1-9]|[1][012])//|-([1-9]|[1][0-9]|[2][0-9]|[3][01])//|-([1][6-9][0-9][0-9]|[2][0][01][0-9])$/;

return regExp.test(day);

Answer 7

Por favor, encuentre en el código a continuación que le permite realizar la validación de fecha para cualquiera de los formatos suministrados o en función de la configuración regional del usuario para validar las fechas de inicio / finalización y finalización. Podría haber algunos enfoques mejores, pero han surgido con esto. Lo he probado para formatos como: MM / dd / aaaa, dd / MM / aaaa, aaaa-MM-dd, aaaa.MM.dd, aaaa / MM / dd y dd-MM-aaaa.

Tenga en cuenta que el formato de fecha y la fecha de la cadena van de la mano.

<script type="text/javascript">
function validate(format) {

    if(isAfterCurrentDate(document.getElementById(''start'').value, format)) {
        alert(''Date is after the current date.'');
    } else {
        alert(''Date is not after the current date.'');
    }
    if(isBeforeCurrentDate(document.getElementById(''start'').value, format)) {
        alert(''Date is before current date.'');
    } else {
        alert(''Date is not before current date.'');
    }
    if(isCurrentDate(document.getElementById(''start'').value, format)) {
        alert(''Date is current date.'');
    } else {
        alert(''Date is not a current date.'');
    }
    if (isBefore(document.getElementById(''start'').value, document.getElementById(''end'').value, format)) {
        alert(''Start/Effective Date cannot be greater than End/Expiration Date'');
    } else {
        alert(''Valid dates...'');
    }
    if (isAfter(document.getElementById(''start'').value, document.getElementById(''end'').value, format)) {
        alert(''End/Expiration Date cannot be less than Start/Effective Date'');
    } else {
        alert(''Valid dates...'');
    }
    if (isEquals(document.getElementById(''start'').value, document.getElementById(''end'').value, format)) {
        alert(''Dates are equals...'');
    } else {
        alert(''Dates are not equals...'');
    }
    if (isDate(document.getElementById(''start'').value, format)) {
        alert(''Is valid date...'');
    } else {
        alert(''Is invalid date...'');
    }
}

/**
 * This method gets the year index from the supplied format
 */
function getYearIndex(format) {

    var tokens = splitDateFormat(format);

    if (tokens[0] === ''YYYY''
            || tokens[0] === ''yyyy'') {
        return 0;
    } else if (tokens[1]=== ''YYYY''
            || tokens[1] === ''yyyy'') {
        return 1;
    } else if (tokens[2] === ''YYYY''
            || tokens[2] === ''yyyy'') {
        return 2;
    }
    // Returning the default value as -1
    return -1;
}

/**
 * This method returns the year string located at the supplied index
 */
function getYear(date, index) {

    var tokens = splitDateFormat(date);
    return tokens[index];
}

/**
 * This method gets the month index from the supplied format
 */
function getMonthIndex(format) {

    var tokens = splitDateFormat(format);

    if (tokens[0] === ''MM''
            || tokens[0] === ''mm'') {
        return 0;
    } else if (tokens[1] === ''MM''
            || tokens[1] === ''mm'') {
        return 1;
    } else if (tokens[2] === ''MM''
            || tokens[2] === ''mm'') {
        return 2;
    }
    // Returning the default value as -1
    return -1;
}

/**
 * This method returns the month string located at the supplied index
 */
function getMonth(date, index) {

    var tokens = splitDateFormat(date);
    return tokens[index];
}

/**
 * This method gets the date index from the supplied format
 */
function getDateIndex(format) {

    var tokens = splitDateFormat(format);

    if (tokens[0] === ''DD''
            || tokens[0] === ''dd'') {
        return 0;
    } else if (tokens[1] === ''DD''
            || tokens[1] === ''dd'') {
        return 1;
    } else if (tokens[2] === ''DD''
            || tokens[2] === ''dd'') {
        return 2;
    }
    // Returning the default value as -1
    return -1;
}

/**
 * This method returns the date string located at the supplied index
 */
function getDate(date, index) {

    var tokens = splitDateFormat(date);
    return tokens[index];
}

/**
 * This method returns true if date1 is before date2 else return false
 */
function isBefore(date1, date2, format) {
    // Validating if date1 date is greater than the date2 date
    if (new Date(getYear(date1, getYearIndex(format)), 
            getMonth(date1, getMonthIndex(format)) - 1, 
            getDate(date1, getDateIndex(format))).getTime()
        > new Date(getYear(date2, getYearIndex(format)), 
            getMonth(date2, getMonthIndex(format)) - 1, 
            getDate(date2, getDateIndex(format))).getTime()) {
        return true;
    } 
    return false;                
}

/**
 * This method returns true if date1 is after date2 else return false
 */
function isAfter(date1, date2, format) {
    // Validating if date2 date is less than the date1 date
    if (new Date(getYear(date2, getYearIndex(format)), 
            getMonth(date2, getMonthIndex(format)) - 1, 
            getDate(date2, getDateIndex(format))).getTime()
        < new Date(getYear(date1, getYearIndex(format)), 
            getMonth(date1, getMonthIndex(format)) - 1, 
            getDate(date1, getDateIndex(format))).getTime()
        ) {
        return true;
    } 
    return false;                
}

/**
 * This method returns true if date1 is equals to date2 else return false
 */
function isEquals(date1, date2, format) {
    // Validating if date1 date is equals to the date2 date
    if (new Date(getYear(date1, getYearIndex(format)), 
            getMonth(date1, getMonthIndex(format)) - 1, 
            getDate(date1, getDateIndex(format))).getTime()
        === new Date(getYear(date2, getYearIndex(format)), 
            getMonth(date2, getMonthIndex(format)) - 1, 
            getDate(date2, getDateIndex(format))).getTime()) {
        return true;
    } 
    return false;
}

/**
 * This method validates and returns true if the supplied date is 
 * equals to the current date.
 */
function isCurrentDate(date, format) {
    // Validating if the supplied date is the current date
    if (new Date(getYear(date, getYearIndex(format)), 
            getMonth(date, getMonthIndex(format)) - 1, 
            getDate(date, getDateIndex(format))).getTime()
        === new Date(new Date().getFullYear(), 
                new Date().getMonth(), 
                new Date().getDate()).getTime()) {
        return true;
    } 
    return false;                
}

/**
 * This method validates and returns true if the supplied date value 
 * is before the current date.
 */
function isBeforeCurrentDate(date, format) {
    // Validating if the supplied date is before the current date
    if (new Date(getYear(date, getYearIndex(format)), 
            getMonth(date, getMonthIndex(format)) - 1, 
            getDate(date, getDateIndex(format))).getTime()
        < new Date(new Date().getFullYear(), 
                new Date().getMonth(), 
                new Date().getDate()).getTime()) {
        return true;
    } 
    return false;                
}

/**
 * This method validates and returns true if the supplied date value 
 * is after the current date.
 */
function isAfterCurrentDate(date, format) {
    // Validating if the supplied date is before the current date
    if (new Date(getYear(date, getYearIndex(format)), 
            getMonth(date, getMonthIndex(format)) - 1, 
            getDate(date, getDateIndex(format))).getTime()
        > new Date(new Date().getFullYear(),
                new Date().getMonth(), 
                new Date().getDate()).getTime()) {
        return true;
    } 
    return false;                
}

/**
 * This method splits the supplied date OR format based 
 * on non alpha numeric characters in the supplied string.
 */
function splitDateFormat(dateFormat) {
    // Spliting the supplied string based on non characters
    return dateFormat.split(//W/);
}

/*
 * This method validates if the supplied value is a valid date.
 */
function isDate(date, format) {                
    // Validating if the supplied date string is valid and not a NaN (Not a Number)
    if (!isNaN(new Date(getYear(date, getYearIndex(format)), 
            getMonth(date, getMonthIndex(format)) - 1, 
            getDate(date, getDateIndex(format))))) {                    
        return true;
    } 
    return false;                                      
}

Debajo está el fragmento de HTML

    <input type="text" name="start" id="start" size="10" value="05/31/2016" />
<br/> 
<input type="text" name="end" id="end" size="10" value="04/28/2016" />
<br/>
<input type="button" value="Submit" onclick="javascript:validate(''MM/dd/yyyy'');" />

Answer 8

Puede simplificarlo un poco cambiando las primeras dos líneas de la función a esto:

var matches = this.match(/^([0-9]{2})//([0-9]{2})//([0-9]{4})$/);

O bien, simplemente cambie el parámetro al constructor RegExp para que sea

^([0-9]{2})//([0-9]{2})//([0-9]{4})$

Answer 9

Si su fecha necesita coincidir con DD.MM.YYYY y usar AngularJS, use el siguiente código:

$scope.validDate = function(value){
            var matches = /^(/d{1,2})[.](/d{1,2})[.](/d{4})$/.exec(value);
            if (matches == null) return false;
            var d = matches[1];
            var m = matches[2] - 1;
            var y = matches[3];
            var composedDate = new Date(y, m, d);
            return composedDate.getDate() == d &&
                composedDate.getMonth() == m &&
                composedDate.getFullYear() == y;
        };
            console.log($scope.validDate(''22.04.2001''));
            console.log($scope.validDate(''03.10.2001''));
            console.log($scope.validDate(''30.02.2001''));
            console.log($scope.validDate(''23.09.2016''));
            console.log($scope.validDate(''29.02.2016''));
            console.log($scope.validDate(''31.02.2016''));

Puede encontrar más información sobre el objeto de alcance here . Sin AngularJS, simplemente cambie la primera línea a:

ValidDate = new function(value) {

Y llámalo usando:

var MyDate= ValidDate(''29.09.2016'');

Answer 10

Uso esta expresión regular para validar MM-DD-YYYY:

function isValidDate(subject){
  if (subject.match(/^(?:(0[1-9]|1[012])[/- //.](0[1-9]|[12][0-9]|3[01])[/- //.](19|20)[0-9]{2})$/)){
    return true;
  }else{
    return false;
  }
}

Solo coincidirá con los meses válidos y puede usar / - o. como separadores.

Answer 11

Yo usaría Moment.js para esta tarea. Hace que sea muy fácil analizar las fechas y también proporciona soporte para detectar una fecha inválida ¹ en el formato correcto. Por ejemplo, considere este ejemplo :

var formats = [''MM-DD-YYYY'', ''MM/DD/YYYY'']

moment(''11/28/1981'', formats).isValid()  // true
moment(''2-29-2003'', formats).isValid()   // false (not leap year)
moment(''2-29-2004'', formats).isValid()   // true  (leap year)

El primer moment(.., formats) se usa para analizar la entrada de acuerdo con el formato localizado suministrado. A continuación, se isValid función isValid en el objeto de momento resultante para que podamos saber realmente si es una fecha válida .

Esto se puede usar para derivar trivialmente el método isValidDate:

String.prototype.isValidDate = function() {
    var formats = [''MM-DD-YYYY'', ''MM/DD/YYYY''];
    return moment("" + this, formats).isValid();
}

¹ Como puedo encontrar escasos comentarios sobre el asunto, solo usaría moment.js para las fechas cubiertas por el calendario gregoriano . Puede haber complementos para otros calendarios (incluidos históricos o científicos).

Answer 12

pase esta función a la fecha con el formato // 10-10-2012 y la identificación del objeto.

function isValidDateFormat(date, id)
{
  var todayDate = new Date();
  var matches = /^(/d{2})[-//](/d{2})[-//](/d{4})$/.exec(date);

  if (matches == null)
  {
   if(date != ''__-__-____'')
    {
      alert(''Please enter valid date'');
    }
  }
  else
  {
    var day    = 31;
    var month  = 12;
    var b_date = date.split("-");
    if(b_date[0] <= day)
    {
      if(b_date[1] <= month)
      {
        if(b_date[2] >= 1900 && b_date[2] <= todayDate.getFullYear())
        {
          return true;
        }
        else
        {
          $("#"+id).val('''');
          alert(''Please enter valid Year''); 
        }         
      }
      else
      {
        $("#"+id).val('''');
        alert(''Please enter valid Month'');    
      } 
    }
    else
    {
      alert(''Please enter valid Day'');
      $("#"+id).val('''');  
    }
  }
}

Answer 13

prueba esto:

function validateDate(dates){
    re = /^(/d{1,2})//(/d{1,2})//(/d{4})$/;     
    var days=new Array(31,28,31,30,31,30,31,31,30,31,30,31);

            if(regs = dates.match(re)) {
                    // day value between 1 and 31
                    if(regs[1] < 1 || regs[1] > 31) {                    
                      return false;
                    }
                    // month value between 1 and 12
                    if(regs[2] < 1 || regs[2] > 12) {                         
                      return false;
                    }

                    var maxday=days[regs[2]-1];

                    if(regs[2]==2){
                        if(regs[3]%4==0){
                            maxday=maxday+1;                                
                        }
                    }

                    if(regs[1]>maxday){
                        return false;
                    }

                    return true;
              }else{
                  return false;
              }                   
}

Answer 14

<!DOCTYPE html>  
<html>  
<head>  

<title></title>  
 <script>
     function dateCheck(inputText) {
         debugger;

         var dateFormat = /^(0?[1-9]|[12][0-9]|3[01])[///-](0?[1-9]|1[012])[///-]/d{4}$/;

         var flag = 1;

         if (inputText.value.match(dateFormat)) {
             document.myForm.dateInput.focus();

             var inputFormat1 = inputText.value.split(''/'');
             var inputFormat2 = inputText.value.split(''-'');
             linputFormat1 = inputFormat1.length;
             linputFormat2 = inputFormat2.length;

             if (linputFormat1 > 1) {
                 var pdate = inputText.value.split(''/'');
             }
             else if (linputFormat2 > 1) {
                 var pdate = inputText.value.split(''-'');
             }
             var date = parseInt(pdate[0]);
             var month = parseInt(pdate[1]);
             var year = parseInt(pdate[2]);

             var ListofDays = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
             if (month == 1 || month > 2) {
                 if (date > ListofDays[month - 1]) {
                     alert("Invalid date format!");
                     return false;
                 }
             }

             if (month == 2) {
                 var leapYear = false;

                 if ((!(year % 4) && year % 100) || !(year % 400)) {
                     leapYear = true;

                 }
                 if ((leapYear == false) && (date >= 29)) {
                     alert("Invalid date format!");
                     return false;
                 }
                 if ((leapYear == true) && (date > 29)) {
                     alert("Invalid date format!");
                     return false;
                 }
             }
             if (flag == 1) {
                 alert("Valid Date");
             }
         }
         else {
             alert("Invalid date format!");
             document.myForm.dateInput.focus();
             return false;
         }
     }
     function restrictCharacters(evt) {

         evt = (evt) ? evt : window.event;
         var charCode = (evt.which) ? evt.which : evt.keyCode;
         if (((charCode >= ''48'') && (charCode <= ''57'')) || (charCode == ''47'')) {
             return true;
         }
         else {
             return false;
         }
     }


 </script>   
</head>



<body>  
    <div>  
        <form name="myForm" action="#">   
            <table>
                <tr>
                    <td>Enter Date</td>
                    <td><input type="text" onkeypress="return restrictCharacters(event);" name="dateInput"/></td>
                    <td></td>
                    <td><span id="span2"></span></td>
                </tr>

                <tr>
                    <td></td>
                    <td><input type="button" name="submit" value="Submit" onclick="dateCheck(document.myForm.dateInput)"  /></td>
                </tr>
            </table>
        </form>  
    </div>   
</body>  
</html> 

Answer 15

<script language = "Javascript">
// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function isInteger(s){
    var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
    var i;
    var returnString = "";
    // Search through string''s characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
    // February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
    for (var i = 1; i <= n; i++) {
        this[i] = 31
        if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
        if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
    var daysInMonth = DaysArray(12)
    var pos1=dtStr.indexOf(dtCh)
    var pos2=dtStr.indexOf(dtCh,pos1+1)
    var strDay=dtStr.substring(0,pos1)
    var strMonth=dtStr.substring(pos1+1,pos2)
    var strYear=dtStr.substring(pos2+1)
    strYr=strYear
    if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
    if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
    for (var i = 1; i <= 3; i++) {
        if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
    }
    month=parseInt(strMonth)
    day=parseInt(strDay)
    year=parseInt(strYr)
    if (pos1==-1 || pos2==-1){
        alert("The date format should be : dd/mm/yyyy")
        return false
    }
    if (strMonth.length<1 || month<1 || month>12){
        alert("Please enter a valid month")
        return false
    }
    if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
        alert("Please enter a valid day")
        return false
    }
    if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
        alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
        return false
    }
    if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
        alert("Please enter a valid date")
        return false
    }
return true
}

function ValidateForm(){
    var dt=document.frmSample.txtDateenter code here
    if (isDate(dt.value)==false){
        dt.focus()
        return false
    }
    return true
 }

</script>

Answer 16

function isValidDate(date)
{
    var matches = /^(/d{1,2})[-//](/d{1,2})[-//](/d{4})$/.exec(date);
    if (matches == null) return false;
    var d = matches[2];
    var m = matches[1] - 1;
    var y = matches[3];
    var composedDate = new Date(y, m, d);
    return composedDate.getDate() == d &&
            composedDate.getMonth() == m &&
            composedDate.getFullYear() == y;
}
console.log(isValidDate(''10-12-1961''));
console.log(isValidDate(''12/11/1961''));
console.log(isValidDate(''02-11-1961''));
console.log(isValidDate(''12/01/1961''));
console.log(isValidDate(''13-11-1961''));
console.log(isValidDate(''11-31-1961''));
console.log(isValidDate(''11-31-1061''));

Funciona. (Probado con Firebug, de ahí el console.log ()).

Answer 17

function isValidDate(date) {
        var valid = true;

        date = date.replace(''/-/g'', '''');

        var month = parseInt(date.substring(0, 2),10);
        var day   = parseInt(date.substring(2, 4),10);
        var year  = parseInt(date.substring(4, 8),10);

        if(isNaN(month) || isNaN(day) || isNaN(year)) return false;

        if((month < 1) || (month > 12)) valid = false;
        else if((day < 1) || (day > 31)) valid = false;
        else if(((month == 4) || (month == 6) || (month == 9) || (month == 11)) && (day > 30)) valid = false;
        else if((month == 2) && (((year % 400) == 0) || ((year % 4) == 0)) && ((year % 100) != 0) && (day > 29)) valid = false;
        else if((month == 2) && ((year % 100) == 0) && (day > 29)) valid = false;
        else if((month == 2) && (day > 28)) valid = false;

    return valid;
}

Esto verifica los días válidos de cada mes y los días bisiestos válidos.

Answer 18

if (document.getElementById(''expiryDay'').value != test(match("/^([0-9]{2})//([0-9]{2})$/"))){
     alert("Enter the date in two digit month flowed by two digits year /n");
}