[xanburzum]

Função para formatar data.

CÓDIGO

function FormataData(Formulario, Campo, TeclaPres)

{

   var tecla = TeclaPres.keyCode;

   var strCampo;

   var vr;

   var tam;

  

   eval("strCampo = document." + Formulario + "." + Campo);

  

   vr = strCampo.value;

   vr = vr.replace(".", "");

   vr = vr.replace("/", "");

   vr = vr.replace("/", "");

   vr = vr.replace("/", "");

   tam = vr.length + 1;



   //Back Space / Tabulação

  

   if (tecla != 9 && tecla != 8)

   {

     if (tam == 3)

     {

       strCampo.value = vr.substr(0, tam - 1) + '/' + vr.substr(tam - 1, tam);

       return;

     }

     if (tam >= 5 && tam <= 10)

     {

       strCampo.value = vr.substr(0, 2) + '/' + vr.substr(2, 2) + '/' + vr.substr(4, 4);

       return;

     }

   }

}

e abaixo uma função para validar a data:

CÓDIGO

function check_date(field){

var checkstr = "0123456789";

var DateField = field;

var Datevalue = "";

var DateTemp = "";

var seperator = "/";

var day;

var month;

var year;

var leap = 0;

var err = 0;

var i;

  err = 0;

  DateValue = DateField.value;

  /* Delete all chars except 0..9 */

  for (i = 0; i < DateValue.length; i++) {

  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {

     DateTemp = DateTemp + DateValue.substr(i,1);

  }

  }

  DateValue = DateTemp;

  /* Always change date to 8 digits - string*/

  /* if year is entered as 2-digit / always assume 20xx */

  if (DateValue.length == 6) {

     DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); }

  if (DateValue.length != 8) {

     err = 20;}

  /* year is wrong if year = 0000 */

  year = DateValue.substr(4,4);

  if (year == 0) {

     err = 20;

  }

  /* Validation of month*/

  month = DateValue.substr(2,2);

  if ((month < 1) || (month > 12)) {

     err = 21;

  }

  /* Validation of day*/

  day = DateValue.substr(0,2);

  if (day < 1) {

    err = 22;

  }

  /* Validation leap-year / february / day */

  if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {

     leap = 1;

  }

  if ((month == 2) && (leap == 1) && (day > 29)) {

     err = 23;

  }

  if ((month == 2) && (leap != 1) && (day > 28)) {

     err = 24;

  }

  /* Validation of other months */

  if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {

     err = 25;

  }

  if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {

     err = 26;

  }

  /* if 00 ist entered, no error, deleting the entry */

  if ((day == 0) && (month == 0) && (year == 00)) {

     err = 0; day = ""; month = ""; year = ""; seperator = "";

  }

  /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */

  if (err == 0) {

     DateField.value = day + seperator + month + seperator + year;

  }

  /* Error-message if err != 0 */

  else {

     alert("Data incorreta!");

     DateField.select();

  DateField.focus();

  }

}