/*
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
<!-- Original:  Torsten Frey (tf@tfrey.de) -->
<!-- Web Site:  http://www.tfrey.de -->
*/
//<!-- Begin
function validateDOB(field){
	var checkstr = "0123456789";
	var Datevalue = "";
	var DateTemp = "";
	var seperator = ".";
	var day;
	var month;
	var year;
	var leap = 0;
	var err = 0;
	var i;
	   err = 0;
	   DateValue = field;
	   /* 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 (DateValue.length == 6) {
		  /* Use 1955 as the break point */
		  /* Rearrange date foramt from yymmdd to ddmmyyyy */
		  if(parseInt(DateValue.substr(0,2)) < 30) {
			  DateValue = DateValue.substr(4,2) + DateValue.substr(2,2) + '20' + DateValue.substr(0,2); 
		  }
		  else{
			  DateValue = DateValue.substr(4,2) + DateValue.substr(2,2) + '19' + DateValue.substr(0,2); 			
		  }
	   }
	   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) {
		  return true;
	   }
	   /* Error-message if err != 0 */
	   else {
		  return false;
	   }
}
//  End -->