<!--
//Begin
function emailCheck (emailStr) {
/* 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. */
	alert("Your 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("Your email address seems incorrect (check @ and .'s)")
    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("Your email address seems incorrect (check @ and .'s)")
		return false
	    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("Your email address seems incorrect (check @ and .'s)")
    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("Your email address seems incorrect (check @ and .'s)")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="Your email address seems incorrect (check @ and .'s)"
   alert(errStr)
   return false
}

// If we've gotten this far, everything's valid!

//validate the rest of the form

return Validate();
}


//global variable for error flag
var errfound = false;

//function to validate by length
function ValidLength(item, len) {
   return (item.length >= len);
}

// display an error alert
function error(elem, text) {
// abort if we already found an error
   if (errfound) return;
   window.alert(text);
   elem.select();
   elem.focus();
   errfound = true;
}

// main validation function
function Validate() {
   errfound = false;
   if (!ValidLength(document.emailform.senderfname.value,1))
      error(document.emailform.senderfname,"Please enter your first name.");
   if (!ValidLength(document.emailform.senderlname.value,1))
      error(document.emailform.senderlname,"Please enter your last name.");
   if (!ValidLength(document.emailform.address1.value,1))
      error(document.emailform.address1,"Please enter your address.");
   if (!ValidLength(document.emailform.city.value,1))
      error(document.emailform.city,"Please enter your city.");
   if (!ValidLength(document.emailform.zip1.value,5))
      error(document.emailform.zip1,"Please enter your zip code.");
   if (!ValidLength(document.emailform.phone1.value,3))
      error(document.emailform.phone1,"Please enter your phone area code.");
   if (!ValidLength(document.emailform.phone2.value,3))
      error(document.emailform.phone2,"Please enter your phone exchange code.");
   if (!ValidLength(document.emailform.phone3.value,4))
      error(document.emailform.phone3,"Please enter your phone number.");
   if (!ValidLength(document.emailform.subject.value,3))
      error(document.emailform.subject,"Please enter a subject line for your email.");
   if (!ValidLength(document.emailform.message.value,3))
      error(document.emailform.message,"Please enter your email.");
  return !errfound; /* true if there are no errors */
}

var isNN = (navigator.appName.indexOf("Netscape")!=-1);
function autoTab(input,len, e) {
var keyCode = (isNN) ? e.which : e.keyCode; 
var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
if(input.value.length >= len && !containsElement(filter,keyCode)) {
	input.value = input.value.slice(0, len);
	input.form[(getIndex(input)+1) % input.form.length].focus();
	}

function containsElement(arr, ele) {
var found = false, index = 0;
while(!found && index < arr.length)
if(arr[index] == ele)
found = true;
else
index++;
return found;
}

function getIndex(input) {
var index = -1, i = 0, found = false;
while (i < input.form.length && index == -1)
if (input.form[i] == input)index = i;
else i++;
return index;
}

return true;
}
//-->