/*function requires presence of arrRE array containing messages and validation masks
*/
function validateForm(form) {
  
var element,elementName,mask,message,isValid;
var formValidated = true;
var errorlayer = getStyleObj('error_layer');
var instlayer = getStyleObj('inst_layer');
for (var i in arrRE) {
elementName = i;
mask = arrRE[i][0];
message = arrRE[i][1];
element = form.elements[i];
isValid = validateElement(element,mask);
if (isValid == false) {
formValidated = false;
document.images[i].src = "imgs/error_bullet.gif";
} else {
document.images[i].src = "imgs/required_bullet.gif";
}
}
if (formValidated == false) {
errorlayer.visibility = "visible";
instlayer.visibility = "hidden";
errorlayer.display = "block";
instlayer.display = "none";
} else {
errorlayer.visibility = "hidden";
instlayer.visibility = "visible";
errorlayer.display = "none";
instlayer.display = "block";
}
return formValidated;
}

function validateElement(element,mask) {
switch (mask)
{
case "default":	
return isNotEmpty(element.value);
break;
case "numeric":
return isNumeric(element.value);
break;
case "creditcard":
return isValidCC(element.value,16);
break;
case "currency":
return isMoney(element.value);
break;
case "float":
return isFloat(element.value);
break;
case "date":
return isValidDate(element.value);
break;
case "email":
return isValidEmail(element.value);
break;
case "phone":
return isValidPhoneNumber(element.value);
break;
case "zip":
return isValidZipCode(element.value);
break;
}
}
function isNotEmpty(str) {
str.split(" ").join("");
str.split("\n").join("");
str.split("\t").join("");
return (str.length > 0);
}
function isNumeric(val) {
if (isNotEmpty(val) == false) {
return false;
}
if (isNaN(val)) {
return false;
}
return true;
}
function isValidCC(ccNo,minLen) {
var str = ccNo.toString();
str = str.split("-").join("");
str = str.split(" ").join("");	
if(isNumeric(str) == false){
return false;
}
var minLen = parseInt(minLen,10);
if(str.length<minLen) return false;
var numbers = str.split("");
var len = numbers.length;
for(var i = 0; i < len; i++, i++){
var num = numbers[i]*2;
num = num.toString();
if(num.length == 2){
num = Number(num.substr(0,1)) + Number(num.substr(1));
}	
numbers[i] = num;
}
var mNum = 0;
for(var i = 0; i < len; i++){
mNum+=Number(numbers[i]);
}
return (mNum%10==0);
}
function isMoney(val) {
}
function isFloat(val) {
}
function isValidDate(val) {
}
function isValidZipCode(val) {
var isValid = false;
var len = val.length;
if (isNotEmpty(val) == false) return false;	
if (val.length != 5 && val.length != 10) {
return false;
}
//standard zip
if (val.length == 5) {
var re = /(\b\d{5}\b)/;	
isValid = re.test(val);
return isValid;
}
//zip plus 4
if (val.length == 10) {
var re2 = /(\b\d{5}-\d\{4}\b)/;
isValid = re2.test(val);
return isValid;
}
}
function isValidEmail(emailStr) {
// Changes:  Sandeep V. Tamhankar (stamhankar@hotmail.com) 
/* 1.1.2: Fixed a bug where trailing . in e-mail address was passing
(the bug is actually in the weak regexp engine of the browser; I
simplified the regexps to make it work).
1.1.1: Removed restriction that countries must be preceded by a domain,
so abc@host.uk is now legal.  However, there's still the 
restriction that an address must end in a two or three letter
word.
1.1: Rewrote most of the function to conform more closely to RFC 822.
1.0: Original  */
/* The following pattern is used to check if the entered e-mail address
fits the user@domain format.  It also is used to separate the username
from the domain. */
var emailPat=/^(.+)@(.+)$/
/* The following string represents the pattern for matching all special
characters.  We don't want to allow special characters in the address. 
These characters include ( ) < > @ , ; : \ " . [ ]    */
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
/* The following string represents the range of characters allowed in a 
username or domainname.  It really states which chars aren't allowed. */
var validChars="\[^\\s" + specialChars + "\]"
/* The following pattern applies if the "user" is a quoted string (in
which case, there are no rules about which characters are allowed
and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
is a legal e-mail address. */
var quotedUser="(\"[^\"]*\")"
/* The following pattern applies for domains that are IP addresses,
rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
e-mail address. NOTE: The square brackets are required. */
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
/* The following string represents an atom (basically a series of
non-special characters.) */
var atom=validChars + '+'
/* The following string represents one word in the typical username.
For example, in john.doe@somewhere.com, john and doe are words.
Basically, a word is either an atom or quoted string. */
var word="(" + atom + "|" + quotedUser + ")"
// The following pattern describes the structure of the user
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
/* The following pattern describes the structure of a normal symbolic
domain, as opposed to ipDomainPat, shown above. */
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
/* Finally, let's start trying to figure out if the supplied address is
valid. */
/* Begin with the coarse pattern to simply break up user@domain into
different pieces that are easy to analyze. */
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */
return false
}
var user=matchArray[1]
var domain=matchArray[2]
// See if "user" is valid 
if (user.match(userPat)==null) {
// user is not valid
return false
}
/* if the e-mail address is at an IP address (as opposed to a symbolic
host name) make sure the IP address is valid. */
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
// this is an IP address
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
return false;
}
}
return true;
}
// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
return false;
}
/* domain name seems valid, but now make sure that it ends in a
three-letter word (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */
/* 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.
return false;
}
// Make sure there's a host name preceding the domain.
if (len<2) {
return false;
}
// If we've gotten this far, everything's valid!
return true;
}
function isValidPhoneNumber(val) {
if (isNotEmpty(val) == false) return false;
//phone number match
re = /[(]?\d{3}[)-]?\s*\d{3}[-]?\s*\d{4}\s*/;
var isValid = re.test(val);
return isValid;	
}