<!-- Begin
//Copyright (C) 2000 Questiva, Inc., All Rights Reserved
//This code functionality, and the pages generated by this code
//for presentation of TailoredMail functionality, are copyrighted
//and comprise trade secrets belonging to Questiva, Inc. and
//any use of the functionality does not constitute transfer of title.

//This functionality is presented as-is, with no warranty of
//fitness for any particular purpose, express or implied.

function emailCheck (emailStr) {
//* 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 .s ; basically, this address doesn't
//     even fit the general mould of a valid e-mail address. */
	//alert("Email address seems incorrect, there are too many '@' characters or no '@' character, or no '.' in the address. Make sure you have entered your complete address, i.e. 'yourname@server.ext'");
	return false;
}
var user=matchArray[1];
var domain=matchArray[2];

// See if "user" is valid 
if (user.match(userPat)==null) {
    // user is not valid
    //alert("The username in your email address doesn't seem to be valid. Please make sure your complete, correct email address is entered.")
    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) {
	        //alert("Destination IP address (numeric email address) is invalid!");
		return false;
	    }
    }
    return true;
}

// Domain is symbolic name
var domainArray=domain.match(domainPat);
if (domainArray==null) {
	//alert("The domain name (the '@x.x' part of the email address) doesn't seem to be valid. Make sure you have entered your complete, accurate email address, in the format 'name@server.ext'");
    return false;
}

///* domain name seems valid, but now make sure that it ends in a
//   three or four-letter word (like com, edu, gov, info) 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>4 && domArr[domArr.length-1].toUpperCase() != "MUSEUM"))
{
   // the address must end in a two, three, or four letter word, OR ".museum".
   //alert("The address must end in a two, three, or four-letter domain (like .uk, .com, .edu, .info, etc.) - Please make sure you entered your email address correctly.");
   return false;
}
/*
var HostName = domArr[domArr.length-2].toUpperCase();

if (HostName=="AOL")
{
	var MyString = "Make sure to add the address to your address book."
}
*/

// Make sure there's a host name preceding the domain.
if (len<2) {
   //alert("Your email address appears to be missing a hostname, please make sure you have entered your complete email address.");
   return false;
}

// If we've gotten this far, everything's valid!
return true;
}
//  End -->