
<!-- Begin
function emailCheck (emailStr) {

var checkTLD=1;

var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

var emailPat=/^(.+)@(.+)$/;

var specialChars="\\(\\)><@,*/?;:\\\\\\\"\\.\\[\\]";

var validChars="\[^\\s" + specialChars + "\]";

var quotedUser="(\"[^\"]*\")";

var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

var atom=validChars + '+';

var word="(" + atom + "|" + quotedUser + ")";

var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

var domainPat=new RegExp("^" + atom + "(\\." + atom + ")*$");

var matchArray=emailStr.match(emailPat);

if (matchArray==null) {

alert("The 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("The email address username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("The email address domain name contains invalid characters.");
return false;
   }
}

if (user.match(userPat)==null) {

alert("The email address 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("The email address 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 email address domain name does not seem to be valid.");
return false;
   }
}

var invaliduser=new Array()
invaliduser[0]="abuse"
invaliduser[1]="spam"
invaliduser[2]="nospam"
invaliduser[3]="spamabuse"
invaliduser[4]="spammer"
invaliduser[5]="uce"

var invaliddomain=new Array()
invaliddomain[0]="abuse"
invaliddomain[1]="spam"
invaliddomain[2]="spamabuse"
invaliddomain[3]="spamcop"
invaliddomain[4]="spamhaus"
invaliddomain[5]="spammingbureau"
invaliddomain[6]="ftc"
invaliddomain[7]="cauce"

var userlowered=user.toLowerCase()
var userArr=userlowered.split(".");
var len1=invaliduser.length;
for (i=0;i<len1;i++) {
if (userArr[0]==invaliduser[i]) {
alert("The email address is prohibited.");
return false;
   }
}

var domainlowered=domain.toLowerCase()
var domainArr=domainlowered.split(".");
var len2=invaliddomain.length;
for (i=0;i<len2;i++) {
if (domainArr[0]==invaliddomain[i]) {
alert("The email address is prohibited.");
return false;
   }
}

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
alert("The email address must end in a well-known domain or two letter " + "country.");
return false;
}

if (len<2) {
alert("This email address is missing a hostname!");
return false;
}

return true;
}

//  End -->