//  V A L I D A T I O N   D E    D A T E S   D A N S    F O R M U L A I R E S
	//
	// copyright 2/2/2002 Le Service Informatique - CCI54
	//
	// procédure permettant de ne proposer que des dates valides dans les boites 
	// de dialogue de formulaires de saisie de dates
	//
	// appel en positionnant  onchange="check_date(this)" dans le
	// champ <SELECT name=date 
	//
	//   ex : pour une date de rdv :
	//    <INPUT TYPE="Text" size='10' maxlength="10" onblur="check_date(this)" NAME="DATE_RDV#" VALUE="#LSDateFormat(DATE_RDV,'dd-mm-yyyy')#"   class=noir8>.
	//
	// ne pas oublier d'insérer ceci en début de page
	//		<script language="JavaScript1.2"  src="valid_date_jjmmaaa.js"></SCRIPT>
	//
	//    jjmmaa (171201)   ou 
  	//    jjmmaaaa (17122001) ou 
	//    jjXmmXaa (17-12-01 ou 17y12q01 ... ) or 
	//    jjXmmXaaaa (17.12.2001 ou 17,12,2001 ...) 
	//    où "X" iest n'importe quel signe sauf un chiffre, i.e. "-" ou "/"
	

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 = 19;}
   /* 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("La date est incorrecte");
      DateField.select();
	  DateField.focus();
	  DateField.value = "";
   }
}
//  End -->