var fBrw=(navigator.userAgent.indexOf('MSIE')!= -1 && navigator.userAgent.indexOf('Windows')!= -1);
var digits = "0123456789";

var lowercaseLetters = "abcdefghijklmnopqrstuvwxyz"

var uppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"


// whitespace characters
var whitespace = " \t\n\r";


// decimal point character differs by language and culture
var decimalPointDelimiter = "."


// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";


// characters which are allowed in US phone numbers
var validUSPhoneChars = digits + phoneNumberDelimiters;


// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = digits + phoneNumberDelimiters + "+";


// non-digit characters which are allowed in 
// Social Security Numbers
var SSNDelimiters = "- ";



// characters which are allowed in Social Security Numbers
var validSSNChars = digits + SSNDelimiters;



// U.S. Social Security Numbers have 9 digits.
// They are formatted as 123-45-6789.
var digitsInSocialSecurityNumber = 9;



// U.S. phone numbers have 10 digits.
// They are formatted as 123 456 7890 or (123) 456-7890.
var digitsInUSPhoneNumber = 10;



// non-digit characters which are allowed in ZIP Codes
var ZIPCodeDelimiters = "-";



// our preferred delimiter for reformatting ZIP Codes
var ZIPCodeDelimeter = "-"


// characters which are allowed in Social Security Numbers
var validZIPCodeChars = digits + ZIPCodeDelimiters



// U.S. ZIP codes have 5 or 9 digits.
// They are formatted as 12345 or 12345-6789.
var digitsInZIPCode1 = 5
var digitsInZIPCode2 = 9


// non-digit characters which are allowed in credit card numbers
var creditCardDelimiters = " "


// CONSTANT STRING DECLARATIONS
// (grouped for ease of translation and localization)

// m is an abbreviation for "missing"

var mPrefix = "You did not enter a value into the "
var mSuffix = " field. This is a required field. Please enter it now."

// s is an abbreviation for "string"

var sUSLastName = "Last Name"
var sUSFirstName = "First Name"
var sWorldLastName = "Family Name"
var sWorldFirstName = "Given Name"
var sTitle = "Title"
var sCompanyName = "Company Name"
var sUSAddress = "Street Address"
var sWorldAddress = "Address"
var sCity = "City"
var sStateCode = "State Code"
var sWorldState = "State, Province, or Prefecture"
var sCountry = "Country"
var sZIPCode = "ZIP Code"
var sWorldPostalCode = "Postal Code"
var sPhone = "Phone Number"
var sFax = "Fax Number"
var sDateOfBirth = "Date of Birth"
var sExpirationDate = "Expiration Date"
var sEmail = "Email"
var sSSN = "Social Security Number"
var sCreditCardNumber = "Credit Card Number"
var sOtherInfo = "Other Information"




// i is an abbreviation for "invalid"

var iStateCode = "This field must be a valid two character U.S. state abbreviation (like CA for California). Please reenter it now."
var iZIPCode = "This field must be a 5 or 9 digit U.S. ZIP Code (like 94043). Please reenter it now."
var iUSPhone = "This field must be a 10 digit U.S. phone number (like 415 555 1212). Please reenter it now."
var iWorldPhone = "This field must be a valid international phone number. Please reenter it now."
var iSSN = "This field must be a 9 digit U.S. social security number (like 123 45 6789). Please reenter it now."
var iEmail = "This field must be a valid email address (like foo@bar.com). Please reenter it now."
var iCreditCardPrefix = "This is not a valid "
var iCreditCardSuffix = " credit card number. (Click the link on this form to see a list of sample numbers.) Please reenter it now."
var iDay = "This field must be a day number between 1 and 31.  Please reenter it now."
var iMonth = "This field must be a month number between 1 and 12.  Please reenter it now."
var iYear = "This field must be a 2 or 4 digit year number.  Please reenter it now."
var iDatePrefix = "The Day, Month, and Year for "
var iDateSuffix = " do not form a valid date.  Please reenter them now."



// p is an abbreviation for "prompt"

var pEntryPrompt = "Please enter a "
var pStateCode = "2 character code (like CA)."
var pZIPCode = "5 or 9 digit U.S. ZIP Code (like 94043)."
var pUSPhone = "10 digit U.S. phone number (like 415 555 1212)."
var pWorldPhone = "international phone number."
var pSSN = "9 digit U.S. social security number (like 123 45 6789)."
var pEmail = "valid email address (like foo@bar.com)."
var pCreditCard = "valid credit card number."
var pDay = "day number between 1 and 31."
var pMonth = "month number between 1 and 12."
var pYear = "2 or 4 digit year number."


// Global variable defaultEmptyOK defines default return value 
// for many functions when they are passed the empty string. 
// By default, they will return defaultEmptyOK.
//
// defaultEmptyOK is false, which means that by default, 
// these functions will do "strict" validation.  Function
// isInteger, for example, will only return true if it is
// passed a string containing an integer; if it is passed
// the empty string, it will return false.
//
// You can change this default behavior globally (for all 
// functions which use defaultEmptyOK) by changing the value
// of defaultEmptyOK.
//
// Most of these functions have an optional argument emptyOK
// which allows you to override the default behavior for 
// the duration of a function call.
//
// This functionality is useful because it is possible to
// say "if the user puts anything in this field, it must
// be an integer (or a phone number, or a string, etc.), 
// but it's OK to leave the field empty too."
// This is the case for fields which are optional but which
// must have a certain kind of content if filled in.

var defaultEmptyOK = false

function repl(replstr,searchchar,withchar)
{
	var Tmpstr="";
	for(i=0;i<replstr.length;i++)
	{
		if (replstr.charAt(i)!= searchchar) Tmpstr = Tmpstr + replstr.charAt(i);
		else Tmpstr = Tmpstr + withchar;
	}
	return Tmpstr;
}
function replSpe(str,arr_repl,arr_with)
{
	k = arr_repl.length;
	l = arr_with.length;
	j = k;
	if (j>l) j = l;
	var Tmpstr="";
	for(i=0;i<str.length;i++)
	{
		found = false;
		for (c=0;c<j;c++)
		{
			if (str.charAt(i) == arr_repl[c]) 
			{
				found = true;
				Tmpstr = Tmpstr + arr_with[c];
				break;
			}
		}
		if (!found) Tmpstr = Tmpstr + str.charAt(i);
	}
	return Tmpstr;
}
function Trim(str)
{
	strobj=str;
	while (strobj.charAt(0)==" ")
		strobj=strobj.substring(1);
	nlen = strobj.length - 1
	while (strobj.charAt(nlen)==" ")
		strobj=strobj.substring(0,nlen--)
	return (strobj);
}

function escapePlus(input) {
var output = "";
for (var i = 0; i < input.length; ++i) {
        var temp = input.charAt(i);
	if (temp == "+" ) {
		temp = "%2B";
	} else if (temp == " ") {
		temp = "%20";
	} else if (temp == "/") {
		temp = "%2F";
	} else {
		temp = escape(temp);
	}
	output += temp;
}
return output;
}


function checkDate(SD,SM,SY) {

  if (((SM == 4) || (SM == 6) || (SM == 9) || (SM == 11)) && (SD == 31)) {
    errorMsg = "Ngay hop nhap sai. ";
    errorMsg = errorMsg + "Thang " + SM;
    errorMsg = errorMsg + " chi co 30 ngay."
    alert(errorMsg);
    return false;
  }

  var leapyear = false;
  var i = SY;
  
  if ( (Math.floor(i/4) == (i/4)) && ((Math.floor(i/100) != (i/100)) || (Math.floor(i/400) == (i/400))) )
    leapyear = true;
  else 
    leapyear = false;
  
  if ( leapyear && (SM == 2) && (SD > 29) ){
      errorMsg = "Ngay hop sai.  Thang 2 nam ";
      errorMsg = errorMsg + SY + " chi co 29 ngay";
      alert(errorMsg);
      return false;
    }

  if ( (SM == 2) && (SD > 28) && (leapyear == false) ) {
      errorMsg = "Ngay hop sai.  Thang 2 nam ";
      errorMsg = errorMsg + SY + " chi co 28 ngay";
    alert(errorMsg);
    return false;
  }

  return true;
}

var isNav4 = false, isNav5 = false, isIE4 = false
var strSeperator = "/"; 
// If you are using any Java validation on the back side you will want to use the / because 
// Java date validations do not recognize the dash as a valid date separator.
var vDateType = 1; 		// Global value for type of date format
//                1 = mm/dd/yyyy
//                2 = yyyy/dd/mm  (Unable to do date check at this time)
//                3 = dd/mm/yyyy
var vYearType = 4; 		//Set to 2 or 4 for number of digits in the year for Netscape
var err = 0; 			// Set the error code to a default of zero
if(navigator.appName == "Netscape") {
if (navigator.appVersion < "5") {
isNav4 = true;
isNav5 = false;
}
else
if (navigator.appVersion > "4") {
isNav4 = false;
isNav5 = true;
   }
}
else isIE4 = true;

function DateFormat(vDateName, vDateValue, e, dateCheck, dateType) {
vDateType = dateType;

//////////////////////////////////////////////////////////////////////////////////////
// vDateName = object name
// vDateValue = value in the field being checked
// e = event
// dateCheck 
//       True  = Verify that the vDateValue is a valid date
//       False = Format values being entered into vDateValue only
// vDateType
//       1 = mm/dd/yyyy
//       2 = yyyy/mm/dd
//       3 = dd/mm/yyyy
//Enter a tilde sign for the first number and you can check the variable information.
//////////////////////////////////////////////////////////////////////////////////////

if (vDateValue == "~") {
alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
vDateName.value = "";
vDateName.focus();
return true;
}
var whichCode = (window.Event) ? e.which : e.keyCode;
// Check to see if a seperator is already present.
// bypass the date if a seperator is present and the length greater than 8
if (vDateValue.length > 8 && isNav4) {
if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1)) return true;
}
//Eliminate all the ASCII codes that are not valid
var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
if (alphaCheck.indexOf(vDateValue) >= 1) {
if (isNav4) {
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
else {
vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
return false;
   }
}
if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
return false;
else {
//Create numeric string values for 0123456789/
//The codes provided include both keyboard and keypad values
var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
if (strCheck.indexOf(whichCode) != -1) {
if (isNav4) {
if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1)) {
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
if (vDateValue.length == 6 && dateCheck) {
var mDay = vDateName.value.substr(2,2);
var mMonth = vDateName.value.substr(0,2);
var mYear = vDateName.value.substr(4,4);
//Turn a two digit year into a 4 digit year
if (mYear.length == 2 && vYearType == 4) {
var mToday = new Date();
//If the year is greater than 30 years from now use 19, otherwise use 20
var checkYear = mToday.getFullYear() + 30; 
var mCheckYear = '20' + mYear;
if (mCheckYear >= checkYear) mYear = '19' + mYear;
else mYear = '20' + mYear;
}
var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
if (!dateValid(vDateValueCheck)) {
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
return true;
}
else {
// Reformat the date for validation and set date type to a 1
if (vDateValue.length >= 8  && dateCheck) {
// mmddyyyy
if (vDateType == 1) {
var mDay = vDateName.value.substr(2,2);
var mMonth = vDateName.value.substr(0,2);
var mYear = vDateName.value.substr(4,4)
vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
}
// yyyymmdd
if (vDateType == 2) {
var mYear = vDateName.value.substr(0,4)
var mMonth = vDateName.value.substr(4,2);
var mDay = vDateName.value.substr(6,2);
vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
}
// ddmmyyyy
if (vDateType == 3) {
var mMonth = vDateName.value.substr(2,2);
var mDay = vDateName.value.substr(0,2);
var mYear = vDateName.value.substr(4,4)
vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
}
//Create a temporary variable for storing the DateType and change
//the DateType to a 1 for validation.
var vDateTypeTemp = vDateType;
vDateType = 1;
var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
if (!dateValid(vDateValueCheck)) {
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateType = vDateTypeTemp;
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
vDateType = vDateTypeTemp;
return true;
}
else {
if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
         }
      }
   }
}
else {
// Non isNav Check
if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
alert("Nhap ngay sai\nYeu cau nhap lai");
vDateName.value = "";
vDateName.focus();
return true;
}
// Reformat date to format that can be validated. mm/dd/yyyy
if (vDateValue.length >= 8 && dateCheck) {
// Additional date formats can be entered here and parsed out to
// a valid date format that the validation routine will recognize.
// mm/dd/yyyy
if (vDateType == 1) {
var mMonth = vDateName.value.substr(0,2);
var mDay = vDateName.value.substr(3,2);
var mYear = vDateName.value.substr(6,4)
}
// yyyy/mm/dd
if (vDateType == 2) {
var mYear = vDateName.value.substr(0,4)
var mMonth = vDateName.value.substr(5,2);
var mDay = vDateName.value.substr(8,2);
}
// dd/mm/yyyy
if (vDateType == 3) {
var mDay = vDateName.value.substr(0,2);
var mMonth = vDateName.value.substr(3,2);
var mYear = vDateName.value.substr(6,4)
}
// Create temp. variable for storing the current vDateType
var vDateTypeTemp = vDateType;
// Change vDateType to a 1 for standard date format for validation
// Type will be changed back when validation is completed.
vDateType = 1;
// Store reformatted date to new variable for validation.
var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
if (vDateValueCheck.length >= 8 && dateCheck) {
//Turn a two digit year into a 4 digit year
if (mYear.length == 2 && vYearType == 4) {
var mToday = new Date();
//If the year is greater than 30 years from now use 19, otherwise use 20
var checkYear = mToday.getFullYear() + 30; 
var mCheckYear = '20' + mYear;
if (mCheckYear >= checkYear) mYear = '19' + mYear;
else mYear = '20' + mYear;
}
vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
} 
if (!dateValid(vDateValueCheck)) {
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateType = vDateTypeTemp;
vDateName.value = "";
vDateName.focus();
return true;
}
vDateType = vDateTypeTemp;
return true;
}
else {
if (vDateType == 1) {
if (vDateValue.length == 2) {
vDateName.value = vDateValue+strSeperator;
}
if (vDateValue.length == 5) {
vDateName.value = vDateValue+strSeperator;
   }
}
if (vDateType == 2)
{
if (vDateValue.length == 4)  
{
vDateName.value = vDateValue+strSeperator;
}
if (vDateValue.length == 7) {
vDateName.value = vDateValue+strSeperator;
   }
}
if (vDateType == 3) {
if (vDateValue.length == 2) {
vDateName.value = vDateValue+strSeperator;
}
if (vDateValue.length == 5) {
vDateName.value = vDateValue+strSeperator;
   }
}
return true;
   }
}
if (vDateValue.length == 10&& dateCheck) {
if (!dateValid(vDateName)) {
// Un-comment the next line of code for debugging the dateValid() function error messages
//alert(err);  
alert("Kieu ngay thang sai\nYeu cau nhap lai");
vDateName.focus();
vDateName.select();
   }
}
return false;
}
else {
// If the value is not in the string return the string minus the last
// key entered.
if (isNav4) {
vDateName.value = "";
vDateName.focus();
vDateName.select();
return false;
}
else {
vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
return false;
         }
      }
   }
}
function dateValid(objName) {
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 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;
strDate = objName;
if (strDate.length < 1) {
return true;
}
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);
   }
}
//Adjustment for short years entered
if (strYear.length == 2) {
strYear = '20' + strYear;
}
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
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;
      }
   }
}
return true;
}
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) {
return true;
   }
}
else {
if ((intYear % 4) == 0) {
return true;
   }
}
return false;
}

/*function checkemail(str){
var filter=/^(\w+(?:\.\w+)*)@((?:\w+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
if (filter.test(str))
testresults=true;
else{
alert("Email nhap sai dinh dang!");
testresults=false;
}
return (testresults);
}

function isValidEmail(str) { 
   return (str.indexOf(".") > 2) && (str.indexOf("@") > 0); 

}*/
function checkemail(emailStr) {
//Get this code from http://javascript.internet.com/forms/check-email.html
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
	alert("Dia chi email danh sai (kiem tra @ va .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]

if (user.match(userPat)==null) {
    // user is not valid
    alert("Username cua email danh sai.")
    return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
	  for (var i=1;i<=4;i++) {
	    if (IPArray[i]>255) {
	        alert("Dia chi IP email danh sai!")
		return false
	    }
    }
    return true
}
// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("Ten domain cua dia chi email sai.")
    return false
}
/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   // the address must end in a two letter or three letter word.
   alert("Dia chi email phai ket thuc bang 3 ky tu cua domain hoac 2 ky tu cua ma quoc gia.")
   return false
}
// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="Dia chi email thieu hostname!"
   alert(errStr)
   return false
}
// If we've gotten this far, everything's valid!
return true;
}

//*********************************************
function isEmpty(s){   
	return ((s == null) || (s.length == 0))
}
/*function isInteger (s){
    	if (isEmpty(s)) 
		if (isInteger.arguments.length == 1) 
			return false;
		else 
			return (isInteger.arguments[1] == true);

    	return reInteger.test(s)
}*/

function isInteger (s)
{   var i;

    if (isEmpty(s)) 
       if (isInteger.arguments.length == 1) return defaultEmptyOK;
       else return (isInteger.arguments[1] == true);

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);

        if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}

function isNumeric(str){
	if (str == "") 
		return false;
	if (isNaN(Math.abs(str)))
		return false;
	else
		return true;
}

/*function isFloat (s){   
	var reFloat = /^((\d+(\.\d*)?)|((\d*\.)?\d+))$/
	if (isEmpty(s)) 
       		if (isFloat.arguments.length == 1) return false;
       		else return (isFloat.arguments[1] == true);
    	return reFloat.test(s)
}*/

function isFloat(s)

{   var i;
    var seenDecimalPoint = false;

    if (isEmpty(s)) 
       if (isFloat.arguments.length == 1) return defaultEmptyOK;
       else return (isFloat.arguments[1] == true);

    if (s == decimalPointDelimiter) return false;

    // Search through string's characters one by one
    // until we find a non-numeric character.
    // When we do, return false; if we don't, return true.

    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);

        if ((c == decimalPointDelimiter) && !seenDecimalPoint) seenDecimalPoint = true;
        else if (!isDigit(c)) return false;
    }

    // All characters are numbers.
    return true;
}

function isValidChar(str,type) //type: Phone, UserName, Number
{
	//return true is valid
	//return false is not valid
	var valid = ""
	var temp = "";
	switch (type)
	{
	case "Phone": 
		valid = "0123456789-() ";
		break;
	case "UserName":
		valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_ ";
		break;
	case "Number":
		valid = "-0123456789."
		break;
	case "Int":
		valid = "0123456789"
		break;
	case "NameEsp":
		valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_ /\[]{}()*.,:;";
		break;
	case "NameE":
		valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_ /\[]{}()*.,:;&?|!@#$%^-=+<>'";
		break;
	}

	for (var i=0; i<str.length; i++){
		temp = "" + str.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") return false;
	}
	return true;
}

function isNotAcceptChar(str,type) //type: SpecialChar
{
	var valid = "";
	var temp = "";
	switch (type)
	{
	case "SpecialChar": 
		valid = "!~@#$%^&*()+={}[]<>?`";
		break;
	}
	for (var i = 0; i < str.length; i++) {
		temp = "" + str.substring(i, i + 1);
		if (!(valid.indexOf(temp) == "-1"))
			return false;
	}
	return true;
}
//----------------------------------
function isPhone(field){
	var valid = "0123456789-() ";
	var temp;
	for (var i=0; i<field.length; i++){
		temp = "" + field.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") return false;
	}
	return true;
}
function isUserName(field){
	var valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";
	var temp;

	for (var i=0; i<field.length; i++){
		temp = "" + field.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") return false;
	}
	return true;
}

function isNumber(str) {
	var valid = "0123456789. "
	var temp;
	for (var i = 0; i < str.length; i++) {
		temp = "" + str.substring(i, i + 1);
		if (valid.indexOf(temp) == "-1") 
			return false;
	}
	return true;
}

function isDigit (c)
{   return ((c >= "0") && (c <= "9"))
}

function ShowImage(img){
  foto1= new Image();
  foto1.src=(img);
  Controlla(img);
}
function Controlla(img){
  if((foto1.width!=0)&&(foto1.height!=0)){
    viewFoto(img);
  }
  else{
    funzione="Controlla('"+img+"')";
    intervallo=setTimeout(funzione,20);
  }
}
function viewFoto(img){
  largh=foto1.width;
  altez=foto1.height;
  stringa="resizable=yes,scrollbars=no,width="+largh+",height="+altez;
  finestra=window.open("","",stringa);

  finestra.document.writeln('<body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">');
  finestra.document.writeln('<a href="" onClick="window.close(); return false;"><img src="' + img + '" border=0></a>');
  finestra.document.writeln('</body>');
}

function openImage(vLink, vHeight, vWidth)
{
	var sLink = (typeof(vLink.href) == 'undefined') ? vLink : vLink.href;

	if (sLink == '')
	{
		return false;
	}

	winDef = 'status=no,resizable=yes,scrollbars=yes,toolbar=no,location=no,fullscreen=no,titlebar=yes,height='.concat(vHeight).concat(',').concat('width=').concat(vWidth).concat(',');
	winDef = winDef.concat('top=').concat((screen.height - vHeight)/2).concat(',');
	winDef = winDef.concat('left=').concat((screen.width - vWidth)/2);
	newwin = open('', '_blank', winDef);

	newwin.document.writeln('<body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">');
	newwin.document.writeln('<a href="" onClick="window.close(); return false;"><img src="', sLink, '" alt="', (fBrw) ? '&#272;&#243;ng l&#7841;i' : 'Dong lai', '" border=0></a>');
	newwin.document.writeln('</body>');

	if (typeof(vLink.href) != 'undefined')
	{
		return false;
	}
}