

<!--

//----------------------------------------------------------------------------
function isnum(s)
// returns true if s contains only numeric characters
{
        for (var i = 0; i < s.length; i++)
        {
                var c =s.charAt(i);
                if ((c != '0') && (c != '1') && (c != '2') && (c != '3') &&
                    (c != '4') && (c != '5') && (c != '6') && (c != '7') && 
                    (c != '8') && (c != '9'))
                        return false;
        }
        return true;
}

//----------------------------------------------------------------------------
function isblank(s)
// returns true if s contains only whitespace characters
{
        for (var i = 0; i < s.length; i++)
        {
                var c =s.charAt(i);
                if ((c != ' ') && (c != '\n') && (c != '\t'))
                        return false;
        }
        return true;
}
//----------------------------------------------------------------------------
function isrepeat(s)
// returns true if s contains only on type character and length > 1
{
var t = s.charAt(1);
        for (var i = 0; i < s.length; i++)
        {
                var c =s.charAt(i);
                if ((c != t))
                        return false;
        }
        return true;
}

//----------------------------------------------------------------------------
function isempty(s)
// returns true if s is blank or s=null or s=""
{
        if ((s == null) || (s == "") || isblank(s) || isrepeat(s))
                return true;
        else
                return false;
}
//----------------------------------------------------------------------------
function isemail (s) {

/* 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=s.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]

// 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
var domainArray=domain.match(domainPat)
if (domainArray==null) {
// alert("The domain name doesn't seem to be valid.");
    return false;
}

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

/* Now we need to break up the domain to get a count of how many atoms
   it consists of. */
var atomPat=new RegExp(atom,"g")
var domArr=domain.match(atomPat)
var len=domArr.length
if (domArr[domArr.length-1].length<2 || 
    domArr[domArr.length-1].length>3) {
   /* the address must end in a two letter or three letter word.
   alert("The address must end in a three-letter 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;
}
//----------------------------------------------------------------------------
function ChkForm()
{
        var i,salute;

        if (isempty(document.MailForm.Lastname.value))
        {
                alert("Please enter your Lastname.");
                return false;
        }

        if (document.MailForm.Salutation[0].checked == true)
                salute = "Mr. " + document.MailForm.Lastname.value;
        
        if (document.MailForm.Salutation[1].checked == true)
                salute = "Mrs. " + document.MailForm.Lastname.value;

        if (document.MailForm.Salutation[2].checked == true)
                salute = "Ms. " + document.MailForm.Lastname.value;

        if (isempty(document.MailForm.email.value))
        {
                alert(salute + ":\n\n" + "Please enter your E-mail address.");
                return false;
        }

        if (!isemail(document.MailForm.email.value))
        {
                alert(salute + ":\n\n" + "Please enter a valid E-mail address.\n\n" + "(e.g.: username@company.com)");
                return false;
        }

        if (isempty(document.MailForm.Firstname.value))
        {
                alert(salute + ":\n\n" + "Please enter your Firstname.");
                return false;
        }

        if (isempty(document.MailForm.Address1.value)   &&
                isempty(document.MailForm.Address2.value))
        {
                alert(salute + ":\n\n" + "Please enter your Address.");
                return false;
        }

        if (isempty(document.MailForm.City.value))
        {
                alert(salute + ":\n\n" + "Please enter your City.");
                return false;
        }

        if (isempty(document.MailForm.State.value))
        {
                alert(salute + ":\n\n" + "Please enter your State or Province.");
                return false;
        }

        if ((document.MailForm.Country.options[0].selected))
        {
                if(isempty(document.MailForm.ZIP.value))
                {
                        alert(salute + ":\n\n" + "ZIP Code is required for addresses in the USA.");
                        return false;
                }

                if(!isnum(document.MailForm.ZIP.value) || document.MailForm.ZIP.value.length < 5)
                {
                        alert(salute + ":\n\n" + "Please enter a valid ZIP Code");
                        return false;
                }
        }


        if (isempty(document.MailForm.Message.value))
        {
                return confirm(salute + ":\n\n" + 'Are you sure you want to send with no message ?');
        }

        return true;
}

//-->