function IsNumber(sText,Label)
{

   var ValidChars = "0123456789-";
   var IsNumber=true;
   var Char;
   if(sText=="") {alert(Label+ " Should not be Empty");return false}
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsNumber = false;
      }
   }
   if(!IsNumber)
   	alert(Label+ " Must Be numeric")
   return IsNumber;
}

function IsFax(sText,Label)
{
   var ValidChars = "0123456789-()";
   var IsNumber=true;
   var Char;
   if(sText=="") {alert(Label+ " Should not be Empty");return false}
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsNumber = false;
      }
   }
   if(!IsNumber)
   	alert(Label+ " Must Be in Format eg:229-230-4443 or (229)-230-4443")
   return IsNumber;
}

function IsAmount(sText)
{
   var ValidChars = "0123456789.";
   var IsAmount=true;
   var Char;
   if(sText=="") return false
   for (i = 0; i < sText.length && IsAmount == true; i++) 	
   { 
		 Char = sText.charAt(i); 
		 if (ValidChars.indexOf(Char) == -1) 
         {
    	     IsAmount = false;
         }
   }
   return IsAmount;
}

function IsValidAmount(sText,Label)
{
	if(!IsAmount(sText))
	{
		alert("Invalid "+Label+".. "+Label+" Must Have Numeric Values")
		return false;
	}
	AmtArray = sText.split(".")
	if(AmtArray.length>2)
	{
		alert("Invalid "+Label+".. "+Label+" Must have single Period for Float")
		return false;
	}
	if(AmtArray.length>1)
	{
		FloatAmt = AmtArray[1];
		if(FloatAmt.length>2)
		{
			alert("Invalid "+Label+"..  Float Value must have two Digits")
			return false;
		}
	}
	return true
}

function isEmailAddr(email,Label) {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email)){
return (true)
}
alert("Invalid "+Label+" Address! Please re-enter.")
return (false)
}


function isEmailAddr1(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function trim(Val)
{
	while(''+Val.charAt(0)==' ')
	Val=Val.substring(1,Val.length);
	return Val
}

function IsValid(Val,Label)
{
	if(trim(Val)=="")
	{
		alert(Label+" Should Not be Empty")
		return false
	}
	return true
}
function TextBoxFocus(id)	{
	document.getElementById(id).className	= "TextBoxFocus";
}
function NormalTextBox(id)	{
	document.getElementById(id).className	= "textbox";
}
function SmallTextBoxFocus(id)	{
	document.getElementById(id).className	= "SmallTextBoxFocus";
}
function NormalSmallTextBox(id)	{
	document.getElementById(id).className	= "smalltextbox";
}	

function IsAlpha(sText,Label)
{
   var ValidChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
   var IsValid=true;
   var Char;
   if(sText=="") {alert(Label+ " Should not be Empty");return false}
   for (i = 0; i < sText.length && IsValid == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsValid = false;
      }
   }
   if(!IsValid)
   	alert("Invalid Characters found in "+Label);
   return IsValid;
}

function IsAlphaNumeric(sText,Label)
{
   var ValidChars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ._-";
   var IsValid=true;
   var Char;
   if(sText=="") {alert(Label+ " Should not be Empty");return false}
   for (i = 0; i < sText.length && IsValid == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsValid = false;
      }
   }
   if(!IsValid)
   	alert("Invalid Characters found in "+Label);
   return IsValid;
}

function IsValidUserName(sText,Label)
{
   var ValidChars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-_";
   var IsValid=true;
   var Char;
   if(sText=="") {alert(Label+ " Should not be Empty");return false}
   for (i = 0; i < sText.length && IsValid == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsValid = false;
      }
   }
   if(!IsValid)
   	alert("Invalid Characters found in "+Label);
   return IsValid;
}
function splitText(theNotes)
{
		theString = theNotes.split("\n")
		NewString = ""
		for(i=0;i<theString.length;i++)
		{
			NewString+=theString[i]+"|"
		}
		return NewString
}

var dtCh= "/";
var minYear=1900;
var maxYear=2100;

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.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 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(dtStr,Label){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	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 (pos1==-1 || pos2==-1){
		alert("The date format should be : dd/mm/yyyy for "+Label)
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month for "+Label)
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day for "+Label)
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear+" for "+Label)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date for "+Label)
		return false
	}
return true
}

function alphanum(alpha,Label)
{
	var numaric = alpha;
	for(var j=0; j<numaric.length; j++)
		{
		  var alphaa = numaric.charAt(j);
		  var hh = alphaa.charCodeAt(0);
		  if((hh > 47 && hh<59) || (hh > 64 && hh<91) || (hh > 96 && hh<123))
		  {
		  }
		else	{
			 alert("Enter Alpha Numeric Values Only")
			 return false;
		  }
		}
 return true;
}


function IsValidHour(sText,Label)
{
	if(!IsAmount(sText))
	{
		alert("Invalid "+Label+".. "+Label+" Must Have Numeric Values")
		return false;
	}
	AmtArray = sText.split(".")
	if(AmtArray.length>2)
	{
		alert("Invalid "+Label+".. "+Label+" Must have single Period for Float")
		return false;
	}
	if(AmtArray.length>1)
	{
		FloatAmt = AmtArray[1];
		if(FloatAmt.length>2)
		{
			alert("Invalid "+Label+"..  Float Value must have two Digits")
			return false;
		}
	}
	if(sText<0 || sText > 24)	{
		alert("Invalid "+Label)
		return false;
	}
	return true
}
function checkUKTelephone (telephoneNumber, Label) {
	// Convert into a string and check that we were provided with something
  var telnum = telephoneNumber + " ";
  if (telnum.length == 1)  {
     //telNumberErrorNo = 1;
	 alert(Label + " not provided");
     return false
  }
  telnum.length = telnum.length - 1;
  
  // Don't allow country codes to be included (assumes a leading "+")
  var exp = /^(\+)[\s]*(.*)$/;
  if (exp.test(telnum) == true) {
     //telNumberErrorNo = 2;
	 alert(Label + " without the country code");
     return false;
  }
  
  // Remove spaces from the telephone number to help validation
  while (telnum.indexOf(" ")!= -1)  {
    telnum = telnum.slice (0,telnum.indexOf(" ")) + telnum.slice (telnum.indexOf(" ")+1)
  }
  
  // Remove hyphens from the telephone number to help validation
  while (telnum.indexOf("-")!= -1)  {
    telnum = telnum.slice (0,telnum.indexOf("-")) + telnum.slice (telnum.indexOf("-")+1)
  }  
  
  // Now check that all the characters are digits
  exp = /^[0-9]{10,11}$/
  if (exp.test(telnum) != true) {
     //telNumberErrorNo = 3;
	 alert(Label + " should contain 10 or 11 digits");
     return false;
  }
  
  // Now check that the first digit is 0
  exp = /^0[0-9]{9,10}$/
  if (exp.test(telnum) != true) {
     //telNumberErrorNo = 4;
	 alert(Label + " should start with a 0");
     return false;
  }
  
  // Finally check that the telephone number is appropriate.
  exp = /^(01|02|05|070|077|078|079)[0-9]+$/;
  if (exp.test(telnum) != true) {
     //telNumberErrorNo = 5;
	 alert(Label + " is either invalid or inappropriate");
     return false;
  }
  // Telephone number seems to be valid - return the stripped telehone number 
  return true; 
 }

function IsNumeric(sText,Label)
{

   var ValidChars = "0123456789-";
   var IsNumber=true;
   var Char;
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
      Char = sText.charAt(i); 
      if(ValidChars.indexOf(Char) == -1) 
      {
         IsNumber = false;
      }
   }
   if(!IsNumber)
   	alert(Label+ " Must Be numeric")
   return IsNumber;
}
function IsValidURL(strURL,n)
{
	strURL 		= strURL.toUpperCase();
			
	if(strURL==""||strURL=="HTTP://") return false	
	thePrefix 	= strURL.substr(0,7).toUpperCase();
	if(thePrefix!="HTTP://") return false;
	if(n!=-1) if(strURL.split("/").length>n) return false;
	
	return true
}
var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
var keyCode = (isNN) ? e.which : e.keyCode; 
var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
if(input.value.length >= len && !containsElement(filter,keyCode)) {
input.value = input.value.slice(0, len);
input.form[(getIndex(input)+1) % input.form.length].focus();
}
function containsElement(arr, ele) {
var found = false, index = 0;
while(!found && index < arr.length)
if(arr[index] == ele)
found = true;
else
index++;
return found;
}
function getIndex(input) {
var index = -1, i = 0, found = false;
while (i < input.form.length && index == -1)
if (input.form[i] == input)index = i;
else i++;
return index;
}
return true;
}
function onKeyPressOnlyNumbers(e)
{
	var key = window.event ? e.keyCode : e.which;
	var keychar = String.fromCharCode(key);
	reg = /[ a-zA-Z!@#$%^&*()-+=_|?<>.,'";:\/\\\[\]{}~`]/;
	return !reg.test(keychar);
}
function onKeyPressOnlyLetters(e)
{
	var key = window.event ? e.keyCode : e.which;
	var keychar = String.fromCharCode(key);
	reg = /[0-9!@#$%^&*()-+=|?<>._,'";:\/\\\[\]{}~`]/;
	return !reg.test(keychar);
}
function IsaCardno(fld)
{ 
	var result=true
	var st=fld.value

	if(!isNaN(st) && st.length>12 && st.length<17)
	{
	
		var adig=parseInt(st.charAt(0))
		var twodig=parseInt(st.substring(0,2))
		var fourdig=parseInt(st.substring(0,4)) 
		
		if(st.length==13) {if(adig==4){result=false}}
		else if(st.length==15)
		{
			if(!(twodig==34 || twodig==37)){result=false}
		}
		else if(st.length==16)
		{
		if(!(adig==4 || fourdig==6011 || twodig==16 || (twodig>50 && twodig<55)))
			{result=false}
		}
		else 
		{
			result=false
			alert("Incorrect number of digits")    
		}
		if(!result){alert("Incorrect prefix")}
		else
		{
			var sum=0
			var v=0
			for(var i=1; i<st.length+1; i++)
			{
				v=parseInt(st.charAt(st.length-i))
				if(i % 2 ==0)
					{sum=sum+(v*2) % 10 + Math.floor((v*2)/10)}
				else
				{sum=sum+v}
			}//for i
			if(sum % 10)
			{
				result=false
				alert("fails LUHN check")
			}
		}//luhn check
	}//if correct length
	else
	{
		result=false
		alert("Incorrect number of digits")
	}

	if(!result)
	{
		fld.select()
	}
	return result
}