var EMAIL1_CHECK_BOX = "cross.gif";
var EMAIL2_CHECK_BOX = "cross.gif";

function emailCheck (emailStr) {

         /* 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. */
      emailStr = emailStr.toLowerCase();

      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=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];

// Start by checking that only basic ASCII characters are in the strings (0-127).

      for (i=0; i<user.length; i++) {
             if (user.charCodeAt(i)>127) {

                   return false;
             }
      }
      for (i=0; i<domain.length; i++) {
              if (domain.charCodeAt(i)>127) {

                   return false;
             }
      }

      // 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.  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) {

          return false;
       }
    }

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

    if (checkTLD && domArr[domArr.length-1].length!=2 && 
    domArr[domArr.length-1].search(knownDomsPat)==-1) {

           return false;
    }

// Make sure there's a host name preceding the domain.

   if (len<2) {

      return false;
   }


   return true;
}

var ftEmail = true
var ftEmail2 = true

function outputEmailCheck(){



    var fieldvalue = document.getElementById('email1').value;
    var fieldvalue2 = document.getElementById('email2').value;

   if (ftEmail == true && fieldvalue != ""){

     document.getElementById('email1Div').style.display = "inline"
     ftEmail = false
     outputEmailCheck()
   }

   if (ftEmail2 == true && fieldvalue2 != ""){

     document.getElementById('email2Div').style.display = "inline"
     ftEmail2 = false
     outputEmailCheck()
   }


   if (document.getElementById('email1').title == "emailchecker"){
          if (!emailCheck(fieldvalue)){
               EMAIL1_CHECK_BOX = "cross.gif";
          }
          else{
               EMAIL1_CHECK_BOX = "check.gif";
          }

          document.getElementById("email1image").src = "/images/"+EMAIL1_CHECK_BOX;

    }

    if (document.getElementById('email1').title != "emailchecker"){

        EMAIL1_CHECK_BOX = "check.gif";
        document.getElementById("email1image").src = "/images/"+EMAIL1_CHECK_BOX;

    }

    if (document.getElementById('email2').title == "emailchecker"){
       if (EMAIL1_CHECK_BOX == "check.gif" && fieldvalue == fieldvalue2){
             EMAIL2_CHECK_BOX = "check.gif";
       }

       else{
             EMAIL2_CHECK_BOX = "cross.gif";
       }
       document.getElementById("email2image").src = "/images/"+EMAIL2_CHECK_BOX;

    }

    if (document.getElementById('email2').title != "emailchecker"){

        EMAIL2_CHECK_BOX = "check.gif";
        document.getElementById("email2image").src = "/images/"+EMAIL2_CHECK_BOX;

    }


}

function EmailPopUpReminder(){

   var fieldvalue = document.getElementById('email1').value
   var fieldvalue2 = document.getElementById('email2').value

   if(document.getElementById('email2').title == "emailchecker" &&
      fieldvalue != fieldvalue2 && fieldvalue != "" && fieldvalue2 !=""){
       alert("Email does not match!")
      }


}

//addEvent(window, "load", outputEmailCheck)
addEvent(document, "keyup", outputEmailCheck)
addEvent(document, "click", outputEmailCheck)
//addEvent(document, "change", EmailPopUpReminder)