<!-- 

// Email Validation Begin

function verifyemail () { /* The following variable tells the rest of the function whether or not to verify that the address ends in a two-letter country or well-known TLD.  1 means check it, 0 means don't. */



myvalidChars = /^[a-zA-Z\_0-9@.-]*$/;

var themessage = "The following fields are required/incorrect: \n";

	

if (document.form.email.value=="") {

	alert("Enter a valid email address");

	return false;

} else if (!myvalidChars.exec(document.form.email.value)) {

	alert("Email: Invalid Character Found!");

	return false;

}



	

var checkTLD=1; 		/* The following is the list of known TLDs that an e-mail address must end with. */

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/; 		/* 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=document.form.email.value.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. */

	alert("Email address seems incorrect (check @ and .'s)");

	return false;

}



var user=matchArray[1];

var domain=matchArray[2];



for (i=0; i<user.length; i++) {

	if (user.charCodeAt(i)>127) {

		alert("Ths username contains invalid characters.");

		return false;

	}

}



for (i=0; i<domain.length; i++) {

	if (domain.charCodeAt(i)>127) {

		alert("Ths domain name contains invalid characters.");

		return false;

	}

}



if (user.match(userPat)==null) {

	alert("The username doesn't seem to be valid.");

	return false;

}



var IPArray=domain.match(ipDomainPat);

if (IPArray!=null) {



	for (var i=1;i<=4;i++) {

		if (IPArray[i]>255) {

			alert("Destination IP address is invalid!");

			return false;

		}

	}



	return true;

}



var atomPat=new RegExp("^" + atom + "$");

var domArr=domain.split(".");

var len=domArr.length;

for (i=0;i<len;i++) {

	if (domArr[i].search(atomPat)==-1) {

		alert("The domain name does not seem to be valid.");

		return false;

	}

}



if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {

	alert("The address must end in a well-known domain or two letter " + "country.");

	return false;

}



if (len<2) {

	alert("This address is missing a hostname!");

	return false;

}



return true;

}



//  End -->