

<!--
function emailCheck (form) {
var emailStr
  emailStr = form.EmailFrom.value

  var checkTLD=1;
  var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum|tv|af|al|dz|as|ad|ao|ai|aq|ag|ap|ar|am|aw|au|at|az|bs|bh|bd|bb|by|be|bz|bj|bm|bt|bo|ba|bw|bv|br|io|bn|bg|bf|mm|bi|kh|cm|ca|cv|ky|cf|td|cl|cn|cx|cc|co|km|cg|cd|ck|cr|ci|hr|cu|cy|cz|dk|dj|dm|do|tp|ec|eg|sv|gq|er|ee|et|fk|fo|fj|fi|cs|su|fr|fx|gf|pf|tf|ga|gm|ge|de|gh|gi|gb|gr|gl|gd|gp|gu|gt|gn|gw|gy|ht|hm|hn|hk|hu|is|in|id|ir|iq|ie|il|it|jm|jp|jo|kz|ke|ki|kw|kg|la|lv|lb|ls|lr|ly|li|lt|lu|mo|mk|mg|mw|my|mv|ml|mt|mh|mq|mr|mu|yt|mx|fm|md|mc|mn|ms|ma|mz|na|nr|np|nl|an|nt|nc|nz|ni|ne|ng|nu|nf|kp|mp|no|om|pk|pw|pa|pg|py|pe|ph|pn|pl|pt|pr|qa|re|ro|ru|rw|gs|sh|kn|lc|pm|st|vc|sm|sa|sn|sc|sl|sg|sk|si|sb|so|za|kr|es|lk|sd|sr|sj|sz|se|ch|sy|tj|tw|tz|th|tg|tk|to|tt|tn|tr|tm|tc|tv|ug|ua|ae|uk|us|uy|um|uz|vu|va|ve|vn|vg|vi|wf|ws|eh|ye|yu|zr|zm|zw)$/;

  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);

// Too many/few @'s or something doesn't fit the general mould of a valid e-mail address.

  if (matchArray==null) {
    alert("Email address seems incorrect (check @ and .'s)");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       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.");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
     }
  }
  for (i=0; i < domain.length; i++) {
    if (domain.charCodeAt(i) > 127)
		 {
      alert("Ths domain name contains invalid characters.");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
     }
  }

// See if "user" is valid 

  if (user.match(userPat)==null) // user is not valid
  {
   alert("The username doesn't seem to be valid.");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       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 is invalid!");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
      }
    }
    return true;
  }

// Domain is symbolic name.  Check if it's valid.
 
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.");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
     }
  }

//  if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
  if (checkTLD && domArr[domArr.length-1].search(knownDomsPat)==-1) {
    alert("The address must end in a well-known domain or two letter " + "country.");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
  }

// Make sure there's a host name preceding the domain.

  if (len<2) {
    alert("This address is missing a hostname!");
       form.EmailFrom.focus();
       form.EmailFrom.select();
       return (false);
  }

// If we've gotten this far, everything's valid!
  return true;
}
//  End -->