function checkMail(email)
{
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(email)) return true;
	else return false;
}

function checkInt(value)
{
	var filter  = /^([0-9])+$/;
	if (filter.test(value)) return true;
	else return false;
}

function trim(s) {
    return s.replace(/^\s+/, '').replace(/\s+$/, '');
}

function check_string_vide(chaine){
	if(trim(chaine) == ''){
		return false;
	}else{
		return true;
	}
}

function check_date(DateValue){

var checkstr = "0123456789";
var DateTemp = "";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
   err = 0;

   /* 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)) {
      return false;
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0) {
   	return true;
   }
   /* Error-message if err != 0 */
   else {
      return false;
   }
}

function CompareDate(date1, date2){
	year1 = date1.substr(6,4);
	month1 = date1.substr(3,2);
	day1 = date1.substr(0,2);
	
	year2 = date2.substr(6,4);
	month2 = date2.substr(3,2);
	day2 = date2.substr(0,2);
	
	d1 = new Date(0);
	d1.setFullYear(year1, month1, day1);
	
	d2 = new Date(0);
	d2.setFullYear(year2, month2, day2);
	
	if(d1 > d2){
		return 1;
	}else if(d1 == d2){
		return 0;
	}else if(d1 < d2){
		return -1;
	}
}