// Error checking by J2
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)$/;

/* 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("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("Ths username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("Ths 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 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 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;
}


function validator(field,alerttxt)
{
	with (field)
	{
		if (value==null||value=="")
		{
			alert(alerttxt);return false;
		}
		else 
		{
			return true;
		}
	}
}


function rdovalidate()
{
		/*if (!(
			document.getElementById('mp3OwnBox').checked || 
			document.getElementById('mp3SendBoxWithShipping').checked || 
			document.getElementById('less32SendBox').checked || 
			document.getElementById('less32SendBoxWithShipping').checked || 
			document.getElementById('tv32SendBox').checked || 
			document.getElementById('tv32SendBoxWithShipping').checked || 
			document.getElementById('tv37SendBox').checked || 
			document.getElementById('tv37SendBoxWithShipping').checked || 
			document.getElementById('vidGamesOwnBox').checked || 
			document.getElementById('vidGamesSendBoxWithShipping').checked || 
			document.getElementById('avProductsOwnBox').checked || 
			document.getElementById('avProductsSendBoxWithShipping').checked
			)){*/
		if (!(
			document.getElementById('mp3OwnBox').checked || 
			document.getElementById('mp3SendBoxWithShipping').checked || 
			document.getElementById('less32SendBox').checked || 
			document.getElementById('less32SendBoxWithShipping').checked || 
			document.getElementById('tv32SendBox').checked || 
			document.getElementById('tv32SendBoxWithShipping').checked ||
			document.getElementById('vidGamesOwnBox').checked || 
			document.getElementById('vidGamesSendBoxWithShipping').checked || 
			document.getElementById('avProductsOwnBox').checked || 
			document.getElementById('avProductsSendBoxWithShipping').checked
			)){
				alert("Please select a repair diagnosis to be performed.");
				//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
				$("#tab_customer").attr('src','images/tab_customer_inactive.png');
				$("#tab_repair").attr('src','images/tab_repair_active.png');
				$("#tab_product").attr('src','images/tab_product_inactive.png');
				$("#tab_complete").attr('src','images/tab_complete_inactive.png');
				$(".inner").hide();
				$("#panel_repair").show();			
				return false;}
		else
			{
				return true;
			}
			
}

function validate()
{
	if(rdovalidate() == false) 
	{ 
		return false; 
	}
	if(validator(document.getElementById('txtManufacturer'), "Please fill in the manufacturer's name.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_inactive.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_active.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');;
		$(".inner").hide();
		$("#panel_product").show();
		document.getElementById('txtManufacturer').focus();	return false;
		
	}
	if(validator(document.getElementById('txtModelno'), "Please fill in the model.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_inactive.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_active.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_product").show();
		document.getElementById('txtModelno').focus();	return false;
		
	}
	if(validator(document.getElementById('txtProblem'), "Please give us a description of the problem.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_inactive.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_active.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_product").show();
		document.getElementById('txtProblem').focus();	return false;
		
	}
	if(validator(document.getElementById('txtName'), "Please fill in your name.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtName').focus();	return false;
		
	}
	if(validator(document.getElementById('txtAddress'), "Please fill in your address.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtAddress').focus();	return false;
		
	}
	if(validator(document.getElementById('txtCity'), "Please fill in your city.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtCity').focus();	return false;
		
	}
	if(validator(document.getElementById('state'), "Please fill in your state.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('state').focus();	return false;
		
	}
	if(validator(document.getElementById('txtZipcode'), "Please fill in your zipcode.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtZipcode').focus();	return false;
		
	}
	if(validator(document.getElementById('txtPhone'), "Please fill in your phone number.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtPhone').focus();	return false;
		
	}
	if(validator(document.getElementById('txtEmail'), "Please fill in your email address.") == false) 
	{	
		//$("#tab_welcome").attr('src','images/tab_welcome_inactive.png');
		$("#tab_customer").attr('src','images/tab_customer_active.png');
		$("#tab_repair").attr('src','images/tab_repair_inactive.png');
		$("#tab_product").attr('src','images/tab_product_inactive.png');
		$("#tab_complete").attr('src','images/tab_complete_inactive.png');;
		$(".inner").hide();
		$("#panel_customer").show();
		document.getElementById('txtEmail').focus();	return false;
		
	}
	return true;
}