function CheckboxIsChecked(chkBoxObj) {
	if(chkBoxObj[0]) {
		for (var i=0;i<chkBoxObj.length;i++) {
			if (chkBoxObj[i].checked == true) {
				return true;
			}
		}
	}
	else if (chkBoxObj.checked == true) {
		return true;
	}
	return false;
} 


function checkEmail (strng) {
	var error="";
	if (strng == "") {
	   error = "You didn't enter an email address.\n";
	}

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(strng))) { 
       error = "Please enter a valid email address.\n";
    }
    else {
	//test email for illegal characters
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
         if (strng.match(illegalChars)) {
          error = "The email address contains illegal characters.\n";
       }
    }
	return error;    
}



function validateEmailAddress(email) {

    if (email == "") {
	   return false;
	}

    var emailFilter=/^.+@.+\..{2,3}$/;
    if (!(emailFilter.test(email))) {  
	   return false;
    }
    else {
	//test email for illegal characters
       var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/
       if (email.match(illegalChars)) {
	        return false;
       }
    }
	return true;
}

// phone number - strip out delimiters and check for 10 digits

function checkPhone (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a phone number.\n";
}

	var stripped = strng.replace(/[\(\)\.\-\ ]/g, ''); //strip out acceptable non-numeric characters

    if (isNaN(stripped)) {
       error = "The phone number contains illegal characters.";

    }
    if (!(stripped.length == 10)) {
	error = "The phone number is the wrong length. Make sure you included an area code.\n";
    } 
return error;
}

// password - between 6-8 chars, uppercase, lowercase, and numeral

function checkPassword (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a password.\n";
}

    var illegalChars = /[\W_]/; // allow only letters and numbers
    
    if ((strng.length < 6) || (strng.length > 15)) {
       error = "The password is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
      error = "The password contains illegal characters.\n";
    } 
    else if (!((strng.search(/(A-Z)+/)) && (strng.search(/(A-Z)+/)) && (strng.search(/(0-9)+/)))) {
       error = "The password must contain at least one uppercase letter, one lowercase letter, and one numeral.\n";
    }  
return error;    
}    


// username - 4-10 chars, uc, lc, and underscore only.

function checkUsername (strng) {
var error = "";
if (strng == "") {
   error = "You didn't enter a username.\n";
}


    var illegalChars = /\W/; // allow letters, numbers, and underscores
    if ((strng.length < 4) || (strng.length > 10)) {
       error = "The username is the wrong length.\n";
    }
    else if (illegalChars.test(strng)) {
    error = "The username contains illegal characters.\n";
    } 
return error;
}       


// non-empty textbox

function isEmpty(strng) {
var error = "";
  if (strng.length == 0) {
     error = "The mandatory text area has not been filled in.\n"
  }
return error;	  
}

// was textbox altered

function isDifferent(strng) {
var error = ""; 
  if (strng != "Can\'t touch this!") {
     error = "You altered the inviolate text area.\n";
  }
return error;
}

// exactly one radio button is chosen

function checkRadio(checkvalue) {
var error = "";
   if (!(checkvalue)) {
       error = "Please check a radio button.\n";
    }
return error;
}

// valid selector from dropdown list

function checkDropdown(choice) {
var error = "";
    if (choice == 0) {
    error = "You didn't choose an option from the drop-down list.\n";
    }    
return error;
}    


// Credit Card Validation Javascript
// copyright 12th May 2003, by Stephen Chapman, Felgall Pty Ltd

// You have permission to copy and use this javascript provided that
// the content of the script is not changed in any way.

function validateCreditCard(s) {
	var v = "0123456789";
	var w = "";
	
	for (var i=0; i < s.length; i++) {
		x = s.charAt(i); 
		if (v.indexOf(x,0) == -1) return false;
	} 
	var j = s.length / 2; 
	if (j < 6.5 || j > 8 || j == 7) return false;
	var k = Math.floor(j);
	var m = Math.ceil(j) - k;
	var c = 0;
	for (var i=0; i<k; i++) {
		a = s.charAt(i*2+m) * 2;
		c += a > 9 ? Math.floor(a/10 + a%10) : a;
	} 
	
	for (var i=0; i<k+m; i++) c += s.charAt(i*2+1-m) * 1;
	
	return (c%10 == 0);
}
function isValidCreditCardNumber(cardNumber, cardType)
{
  var isValid = false;
  var ccCheckRegExp = /[^\d]/;
  isValid = !ccCheckRegExp.test(cardNumber);

  if (isValid)
  {
    var cardNumbersOnly = cardNumber;
    var cardNumberLength = cardNumbersOnly.length;
    var lengthIsValid = false;
    var prefixIsValid = false;
    var prefixRegExp;

    switch(cardType)
    {
      case "MC":
        lengthIsValid = (cardNumberLength == 16);
        prefixRegExp = /^5[1-5]/;
		prefixIsValid = prefixRegExp.test(cardNumbersOnly);
        break;

      case "VS":
        lengthIsValid = (cardNumberLength == 16 || cardNumberLength == 13);
        prefixRegExp = /^4/;
		prefixIsValid = prefixRegExp.test(cardNumbersOnly);
        break;

      case "AX":
        lengthIsValid = (cardNumberLength == 15);
        prefixRegExp = /^3(4|7)/;
		prefixIsValid = prefixRegExp.test(cardNumbersOnly);
        break;

      default:
        lengthIsValid = true; 
        prefixIsValid=true;
    }

    isValid = prefixIsValid && lengthIsValid;
  }

  if (isValid)
  {
    var numberProduct;
    var numberProductDigitIndex;
    var checkSumTotal = 0;

    for (digitCounter = cardNumberLength - 1; 
      digitCounter >= 0; 
      digitCounter--)
    {
      checkSumTotal += parseInt (cardNumbersOnly.charAt(digitCounter));
      digitCounter--;
      numberProduct = String((cardNumbersOnly.charAt(digitCounter) * 2));
      for (var productDigitCounter = 0;
        productDigitCounter < numberProduct.length; 
        productDigitCounter++)
      {
        checkSumTotal += 
          parseInt(numberProduct.charAt(productDigitCounter));
      }
    }

    isValid = (checkSumTotal % 10 == 0);
  }

  return isValid;
}

function validateCCExp(ExpMo,ExpYr) {
	var today = new Date();

	if( ExpYr+0 > today.getYear())
		return true;
		
	if( ExpYr+0 == today.GetYear() && ExpMo+0 >= today.GetMonth() )
		return true;
	
	return false;
}


function validateInteger(string) {
    if (!string) return false;
    var Chars = "0123456789";

    for (var i = 0; i < string.length; i++) {
       if (Chars.indexOf(string.charAt(i)) == -1)
          return false;
    }
    return true;
} 

function validateFloat(string) {
    if (!string) return false;
    var Chars = "0123456789.";
	var decPtFound = false;
	
    for (var i = 0; i < string.length; i++) {
		//look for multiple decimal pts. or a decimal pt first char.
		if(string.charAt(i) == "." && (decPtFound || i == 0))
			return false;
		else
			decPtFound = true;
       if (Chars.indexOf(string.charAt(i)) == -1)
          return false;
    }
    return true;
}
 
function validateCurrency(string) {
    if (!string) return false;
    var Chars = "0123456789.$";
	var decPtFound = false;
	
    for (var i = 0; i < string.length; i++) {
		//look for multiple decimal pts. or a decimal pt first char.
		 if(string.charAt(i) == "." && (decPtFound || i == 0)) {
			return false;
		}
		else if(string.charAt(i) == ".")
			decPtFound = true;
			
		if (Chars.indexOf(string.charAt(i)) == -1)
          	return false;
    }
    return true;
}

function validateDate(string) {
	var re = /(?=\d)^(?:(?!(?:10\D(?:0?[5-9]|1[0-4])\D(?:1582))|(?:0?9\D(?:0?[3-9]|1[0-3])\D(?:1752)))((?:0?[13578]|1[02])|(?:0?[469]|11)(?!\/31)(?!-31)(?!\.31)|(?:0?2(?=.?(?:(?:29.(?!000[04]|(?:(?:1[^0-6]|[2468][^048]|[3579][^26])00))(?:(?:(?:\d\d)(?:[02468][048]|[13579][26])(?!\x20BC))|(?:00(?:42|3[0369]|2[147]|1[258]|09)\x20BC))))))|(?:0?2(?=.(?:(?:\d\D)|(?:[01]\d)|(?:2[0-8])))))([-.\/])(0?[1-9]|[12]\d|3[01])\2(?!0000)((?=(?:00(?:4[0-5]|[0-3]?\d)\x20BC)|(?:\d{4}(?!\x20BC)))\d{4}(?:\x20BC)?)(?:$|(?=\x20\d)\x20))?((?:(?:0?[1-9]|1[012])(?::[0-5]\d){0,2}(?:\x20[aApP][mM]))|(?:[01]\d|2[0-3])(?::[0-5]\d){1,2})?$/
	return re.test(string);
}
function changeButtonText(btn,text) {
	
	btn.value=text;
	
}