// function to only allow numeric values in fields..
function numbersonly(myfield, e, dec)
{
  var key;
  var keychar;

  if (window.event)
      key = window.event.keyCode;
  else if (e)
      key = e.which;
  else
      return true;
  keychar = String.fromCharCode(key);

  // control keys
  if ((key==null) || (key==0) || (key==8) || (key==9) || (key==13) || (key==27) )
      return true;

  // numbers
  else if ((("0123456789").indexOf(keychar) > -1))
      return true;

  // other allowable characters eg., '-' 
  else if (dec != null) {
      for (var i = 0; i < dec.length; i++)
        if (keychar == dec.substr(i,1))
            return true;
  }
  return false;
}

// function to validate e-mail address entered (extensive)...
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. */
  
  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)$/i;
  
  /* 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=/^(.+)@(.+)$/i;
  
  /* 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=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/i;
  
  /* 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 + ")*$", "i");
  
  /* The following pattern describes the structure of a normal symbolic
  domain, as opposed to ipDomainPat, shown above. */
  
  var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$", "i");
  
  /* 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. */
  
    alert("The email address seems incorrect (check @ and .'s)");
    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) {
      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;
    }
  }
  
  // See if "user" is valid 
  
  if (user.match(userPat)==null) {
  
    // user is not valid
  
    alert("The email address 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("The email address destination IP address is invalid!");
        return false;
      }
    }
    return true;
  }
  
  // Domain is symbolic name.  Check if it's valid.
  var atomPat=new RegExp("^" + atom + "$", "i");
  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;
    }
  }
  
  /* 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) {
    alert("The email 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 email address is missing a hostname!");
    return false;
  }
  
  // If we've gotten this far, everything's valid!
  return true;
}

// THE FOLLOWING FUNCTION(S) VALIDATE PHONE NUMBER FIELDS...
// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function checkInternationalPhone(strPhone){
s=stripCharsInBag(strPhone,validWorldPhoneChars);
return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function ValidatePhone(Phone){
	
/*
	if ((Phone.value==null)||(Phone.value=="")){
		alert("Please Enter a Phone Number")
		Phone.focus()
		return false
	}
*/
	if (checkInternationalPhone(Phone.value)==false){
		alert("Please Enter a Valid Phone Number")
		Phone.value=""
		Phone.focus()
		return false
	}
	return true
 }