function checkNumeric(objName,minval, maxval,comma,period,hyphen,less,more,equal,Namealert)
{	var numberfield = objName;
	if (chkNumeric(objName,minval,maxval,comma,period,hyphen,less,more,equal,Namealert) == false)
	{
		numberfield.select();
		numberfield.focus();
		return false;
	}
	else
	{
		return true;
	}
}

function chkNumeric(objName,minval,maxval,comma,period,hyphen,less,more,equal,Namealert)
{
	// only allow 0-9 be entered, plus any values passed
	// (can be in any order, and don't have to be comma, period, or hyphen)
	// if all numbers allow commas, periods, hyphens or whatever,
	// just hard code it here and take out the passed parameters
	var checkOK = "0123456789" + comma + period + hyphen + less + more + equal;
	var checkStr = objName;
	var allValid = true;
	var decPoints = 0;
	var allNum = "";

	if ( Namealert == '' )
	{	Namealert=checkStr.name;
	}

	for (i = 0;  i < checkStr.value.length;  i++)
	{	ch = checkStr.value.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
		if (ch == checkOK.charAt(j))
		break;
		if (j == checkOK.length)
		{	allValid = false;
			break;
		}
		if (ch != ",")
		allNum += ch;
	}
	if (!allValid)
	{	//alertsay = "Please enter only these values \""
		//alertsay = alertsay + checkOK + "\" in the \"" + Namealert + "\" field."
		alertsay ="กรุณาใส่ข้อมูลในรูปแบบ \'" + checkOK + "\' ในฟิลด์ \'" + Namealert + "\'";
		alert(alertsay);
		return (false);
	}

	// set the minimum and maximum
	var chkVal = allNum;
	var allNumChk=allNum;
//alert('allNumChk='+allNumChk);
	var posless=allNumChk.indexOf(less);
	if(less!='')
	{	while(posless!=-1)
		{	allNumChk=allNumChk.substring(0,posless)+allNumChk.substring(posless+1);
			posless=allNumChk.indexOf(less,posless+1);
		}
	}
	var posmore=allNumChk.indexOf(more);
	if(more!='')
	{	while(posmore!=-1)
		{	allNumChk=allNumChk.substring(0,posmore)+allNumChk.substring(posmore+1);
			posmore=allNumChk.indexOf(more,posmore+1);
		}
	}
	var posequal=allNumChk.indexOf(equal);
	if(equal!='')
	{	while(posequal!=-1)
		{	allNumChk=allNumChk.substring(0,posequal)+allNumChk.substring(posequal+1);
			posequal=allNumChk.indexOf(equal,posequal+1);
		}
	}
//alert('allNumChk='+allNumChk);
	var prsVal = parseInt(allNumChk);
	if (chkVal != "" && !(prsVal >= minval && prsVal <= maxval))
	{	//alertsay = "Please enter a value greater than or "
		//alertsay = alertsay + "equal to \"" + minval + "\" and less than or ";
		//alertsay = alertsay + "equal to \"" + maxval + "\" ในฟิลด์ \"" + Namealert + "\"";
		//alert(alertsay);
		alert('กรุณาใส่ค่าที่อยู่ระหว่าง '+minval+' ถึง '+maxval+' เท่านั้น');
		return (false);
		//return (true)
	}
}





var dtCh= "/";
var minYear=1;
var maxYear=9999;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
	year = year-543;
    return ((((year-3) % 4 == 0) && ( (!((year-3) % 100 == 0)) || ((year-3) % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(objName,less,more,equal,Namealert){
//	var less='<';	 var more='>';	var equal='=';
//alert('dtStr='+dtStr);
	var dtStr=objName.value;
	var checkOK = "0123456789/" + less + more + equal;
	//var checkStr = objName;
	var allValid = true;
	var decPoints = 0;
	var allNum = "";

	for (i = 0;  i < objName.value.length;  i++)
	{	ch = objName.value.charAt(i);
		for (j = 0;  j < checkOK.length;  j++)
		if (ch == checkOK.charAt(j))
		break;
		if (j == checkOK.length)
		{	allValid = false;
			break;
		}
		if (ch != ",")
		allNum += ch;
	}
	if (!allValid)
	{	//alertsay = "Please enter only these values \""
		//alertsay = alertsay + checkOK + "\" in the \"" + Namealert + "\" field."
		alertsay ="กรุณาใส่ข้อมูลในรูปแบบ \'" + checkOK + "\' ในฟิลด์ \'" + Namealert + "\'";
		alert(alertsay);
		return (false);
	}

	var posless=dtStr.indexOf(less);
	if(equal!='')
	{	while(posless!=-1)
		{	dtStr=dtStr.substring(0,posless)+dtStr.substring(posless+1);
			posless=dtStr.indexOf(less,posless+1);
		}
	}
	var posmore=dtStr.indexOf(more);
	if(more!='')
	{	while(posmore!=-1)
		{	dtStr=dtStr.substring(0,posmore)+dtStr.substring(posmore+1);
			posmore=dtStr.indexOf(more,posmore+1);
		}
	}
	var posequal=dtStr.indexOf(equal);
	if(equal!='')
	{	while(posequal!=-1)
		{	dtStr=dtStr.substring(0,posequal)+dtStr.substring(posequal+1);
			posequal=dtStr.indexOf(equal,posequal+1);
		}
	}
//alert('dtStr='+dtStr);
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	//var strMonth=dtStr.substring(0,pos1)
	//var strDay=dtStr.substring(pos1+1,pos2)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strDay=dtStr.substring(0,pos1)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if(dtStr!=''){
		if (pos1==-1 || pos2==-1){
			//alert("The date format should be : dd/mm/yyyy")
			alert("กรุณาใส่รูปแบบวันที่ dd/mm/yyyy")
			return false
		}
		if (strMonth.length<1 || month<1 || month>12){
			//alert("Please enter a valid month")
			alert("ข้อมูลเลขเดือนผิดพลาด โปรดตรวจสอบเลขเดือนใหม่อีกครั้ง");
			return false
		}
		if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
			//alert("Please enter a valid day")
			alert("ข้อมูลเลขวันผิดพลาด โปรดตรวจสอบเลขวันใหม่อีกครั้ง");
			return false
		}
		if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
			//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
			alert("ข้อมูลเลขปีผิดพลาด โปรดตรวจสอบเลขปีใหม่อีกครั้ง โดยเลขปีควรอยู่ในช่วง "+minYear+" ถึง "+maxYear)
			return false
		}
		if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
			//alert("Please enter a valid date")
			alert("ข้อมูลเลขวันที่ผิดพลาด โปรดตรวจสอบเลขวันที่ใหม่อีกครั้ง");
			return false
		}
	}
return true
}

function ValidateForm(objName,less,more,equal,Namealert){
	var dt=objName;//document.frmSample.txtDate
	if (isDate(dt,less,more,equal,Namealert)==false){
		dt.select();
		dt.focus();
		return false
	}
    return true
 }

function ValidateTime(objName,sign,Namealert)
{
	var tStr=objName;
	var hh = 0; var mm = 0; 
	if(tStr.value==''){ return true;}
	else
	if(tStr.value.length!=5)
	{//alert('a');
		alert("ข้อมูลเวลาผิดพลาด โปรดใส่ข้อมูลเวลาในรูปแบบ HH.MM");
		tStr.select();
		tStr.focus();
		return false
	}
	if(tStr.value.substring(2,3)!=sign)
	{//alert('b');
		alert("ข้อมูลเวลาผิดพลาด โปรดใส่ข้อมูลเวลาในรูปแบบ HH.MM");
		tStr.select();
		tStr.focus();
		return false
	}
	else
	{
		if(tStr.value.substring(0,2)=='08')
		{
			hh = 8;
		}
		else
		if(tStr.value.substring(0,2)=='09')
		{
			hh = 9;
		}
		else { hh = parseInt(tStr.value.substring(0,2));
		}
		
		if(tStr.value.substring(3)=='08')
		{
			mm = 8;
		}
		else
		if(tStr.value.substring(3)=='09')
		{
			mm = 9;
		}
		else { mm = parseInt(tStr.value.substring(3));
		}

		if(hh>24&&hh<0){ alert("ข้อมูลเวลาผิดพลาด โปรดใส่ข้อมูลชั่วโมงอยู่ในช่วง 0-24"); tStr.select(); 	tStr.focus(); return false}
		if(mm>60&&mm<0){ alert("ข้อมูลเวลาผิดพลาด โปรดใส่ข้อมูลชั่วโมงอยู่ในช่วง 0-60"); tStr.select(); 	tStr.focus(); return false}
		return true;
	}
}