function VerifyDate(ObjectName, alert_text, ObjectFeild)
		{
		 	var strTemp;
			var l_CheckDate;
			 strTemp=ObjectFeild.value;

			 if (strTemp.length  > 0) 
			 {   
			      l_CheckDate=chkdate(ObjectFeild);
			   if (l_CheckDate==false)            /*проверить дату */
			     {			  
			  			if (alert_text != "") {alert_text = alert_text + "\n"}
			  			alert_text=alert_text + ObjectName + ": ivalid date!";
                 }
			  }
		 return alert_text;
		}

// 
function chkdate(objName) {
//var strDatestyle = "EU";  
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparatorArray = new Array("-"," ","/",".");
var intElementNr;
var err = 0;
var SepNb=0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
strDate = datefield.value  ;
if (strDate.length < 1) {
										return false;
										}
else 
	{	if  (strDate.indexOf('.') == -1 &&  strDate.indexOf('-') == -1 && strDate.indexOf(' ') == -1 && strDate.indexOf('/') == -1 )  
			{
			return false;
			}
for (intElementNr = 0; intElementNr < strSeparatorArray.length;
intElementNr++) {
	if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
		strDateArray = strDate.split(strSeparatorArray[intElementNr]);
			if (strDateArray.length != 3) {
				err = 1;
				return false;
				}
			else {
					strDay = strDateArray[0];
					strMonth = strDateArray[1];
					strYear = strDateArray[2];
						}
		booFound = true;
		}
}
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
   }
}
if (strYear.length == 2) {
strYear = '20' + strYear;
}
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
   }
}
if (isNaN(intMonth)) {
err = 3;
return false;
   }
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 ||
intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday
< 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) &&
(intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
}
}
else {
if (intday > 28) {
err = 10;
return false;
}
}
}
//US_date=strMonth + '/' + strDay + '/' +strYear;
return true;
}

// проверка высокосного года
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}