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;
	/* 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(0,2);
	if ((month < 1) || (month > 12)) {
		err = 21;
	}
	/* Validation of day*/
	day = DateValue.substr(2,2);
	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 = 27; 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 {
		return err;
	}
	return err;
}
function validate_email(str)
{
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)>=(lstr-1)){
		    return false
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }
		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
 		 return true					
	}
 function checkPhoneNumber(tnmbr) {
	if (tnmbr.search(/\d{3}\-\d{3}\-\d{4}/)==-1)
		return false;
	else
		return true;
}
function IsValidTime(timeStr) {
// Checks if time is in HH:MM:SS AM/PM format.
// The seconds and AM/PM are optional.
var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;

var matchArray = timeStr.match(timePat);
var err = 0;
if (matchArray == null) {
//	alert("Time is not in a valid format.");
	err = 1;
	return err;
}
hour = matchArray[1];
minute = matchArray[2];
second = matchArray[4];
ampm = matchArray[6];

if (second=="") { second = null; }
if (ampm=="") { ampm = null }
if (hour < 0  || hour > 23) {
//	alert("Hour must be between 1 and 12. (or 0 and 23 for military time)");
	err = 2;
	return err;
}

if (hour <= 12 && ampm == null) {
//if (confirm("Please indicate which time format you are using.  OK = Standard Time, CANCEL = Military Time")) {
//	alert("You must specify AM or PM.");
	err = 3;
	return err;
//   }
}

if  (hour > 12 && ampm != null) {
//	alert("You can't specify AM or PM for military time.");
	err = 4;
	return err;
}
if (minute<0 || minute > 59) {
//	alert ("Minute must be between 0 and 59.");
	err = 5;
	return err;
}
if (second != null && (second < 0 || second > 59)) {
//	alert ("Second must be between 0 and 59.");
	err = 6;
	return err;
}
return err;
}