<!-- BEGIN

function check_it(which,check_email) { 
  // which - values from form
  // check_email - value of email entry to check

  // required - array of required field names in the form
  required = Array(
    "name",
    "email",
    "comment"
  );
  // required_text - printed in alert (instead of field name)
  required_text = Array(
    "Name",
    "Email Address",
    "Comments" 
  );

  var ok;
  ok = required_fields(which);
 
  if (ok) { // have required fields, check email
    ok = emailCheck(check_email);
    if (!ok) { 
      alert("Your email address\n  " + check_email +
        "\ndoes not appear to be valid.\n" +
        "Please correct this error and resubmit.");
    }
  }
  return ok;
}  

function required_fields(which) {
  // checks if all required fields are filled in
  // do not change the rest of this function
  // adapted from script by wsabstract.com posted at 
  // The JavaScript Source!! http://javascript.internet.com

  // textarea does not work

  var pass = true;
  var msg = "Please make sure that entries for \n";
  var num = 0; 
 
  if (document.images) {
    for (i=0; i<which.length; i++) {
      var tempobj=which.elements[i];
      for (j = 0; j < required.length; j++) {
        if (tempobj.name==required[j]) {
          if (((tempobj.type=="password" ||
            tempobj.type=="text" ||
            tempobj.type=="file" ||
            tempobj.type=="textarea") && 
            tempobj.value=='') ||
            (tempobj.type.toString().charAt(0)=="s" && 
             tempobj.selectedIndex==0)) {
            pass=false;
            num += 1;
            msg += "  * " + required_text[j] + "\n";
          }
        } 
      }
    }
  }  
 
  if (!pass) {
    if (num > 1) { msg += "are entered correctly.\n"; }
    else { msg += "is entered correctly.\n"; }
    alert(msg);
    return false;
  }
  else { return true; }
}


function emailCheck(emailStr) {
  // V1.1.3: Sandeep V. Tamhankar (stamhankar@hotmail.com) 
  // The JavaScript Source!! http://javascript.internet.com

  // Modified by Dan Jacobs 
  // comment out alerts - use return true/false only

  /* 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. */

  var checkTLD=1;

  /* 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. Also used to separate the username from the domain. */

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

  /* This string represents the pattern for matching all special characters.  
   We don't want to allow special characters in the address, such as
   ( ) < > @ , ; : \ " . [ ] */

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

  /* The following string represents the range of characters allowed in a
   user name or domain name. 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, start 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 mold of a valid e-mail address. */
    //alert("Email address seems incorrect (check @ and .'s)");
    return false;
  }

  var user=matchArray[1];
  var domain=matchArray[2];

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

  for (i=0; i<user.length; i++) {
    if (user.charCodeAt(i)>127) {
      //alert("The username contains invalid characters.");  
      return false;
    }
  }
  for (i=0; i<domain.length; i++) {
    if (domain.charCodeAt(i)>127) {
      //alert("The domain name contains invalid characters.");
      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.");
    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!");
        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.");
      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 a hostname precedes the domain or country. */

  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;
  }

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

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

  // If we've gotten this far, everything's valid!
  return true;
}

//END -->