var selectedProduct;
var DOMsupported = 0;
var standardDOMsupported = 0;
var ieDOMsupported = 0;
var netscapeDOMsupported = 0;
if (document.getElementById) {
	standardDOMsupported = 1; DOMsupported = 1;
}
else { 
	if (document.all) {
		ieDOMsupported = 1; DOMsupported = 1;
	}
	else {
		browserVersion = parseInt(navigator.appVersion);
		if ((navigator.appName.indexOf('Netscape') != -1) && 
		(browserVersion ==4)) {
			netscapeDOMsupported = 1; DOMsupported = 1;
		}
	}
}

function findDOM(objectId, wS) {
	if (standardDOMsupported) 
	return wS ? document.getElementById(objectId).style : 
	document.getElementById(objectId);
	if (ieDOMsupported) 
	return wS ? document.all[objectId].style : 
	document.all[objectId];
	if (netscapeDOMsupported) 
	return document.layers[objectId];
}

function toggleMajordomoCBox() {
	if (document.download_form.majordomo) {
		document.download_form.majordomo.checked = 
		!document.download_form.majordomo.checked;
	}
}

function toggleMajordomo(selected, emailRequired) {
	if ( document.download_form.gen_license &&
		!document.download_form.gen_license.disabled &&
		document.download_form.gen_license.checked )
		emailRequired = true;

	var emailText = findDOM('emailText', 0);
	if ( emailRequired || selected ) {
		emailText.innerText = 'Email (required):';
		emailText.textContent = 'Email (required):';
	}
	else {
		emailText.innerText = 'Email:';
		emailText.textContent = 'Email:';
	}
}

function toggleLicenseGenCBox() {
	if (document.download_form.gen_license && !document.download_form.gen_license.disabled) {
		document.download_form.gen_license.checked = !document.download_form.gen_license.checked;
	}
}

function toggleLicenseGen(selected, emailRequired) {
	if (document.download_form.gen_license.disabled)
		return;

	if ( document.download_form.ip )
		document.download_form.ip.disabled = !selected;

	if ( document.download_form.majordomo && document.download_form.majordomo.checked )
		emailRequired = true;

	var emailText = findDOM('emailText', 0);
	if ( emailRequired || selected ) {
		emailText.innerText = 'Email (required):';
		emailText.textContent = 'Email (required):';
	}
	else {
		emailText.innerText = 'Email:';
		emailText.textContent = 'Email:';
	}
}

function refreshUI(emailRequired) {
	var majordomoSelected = false;
	var genLicSelected = false;
	if ( document.download_form.majordomo &&
		document.download_form.majordomo.checked ) {
			majordomoSelected = true;
	}

	if ( document.download_form.gen_license &&
		!document.download_form.gen_license.disabled &&
		document.download_form.gen_license.checked ) {
			genLicSelected = true;
	}

	if ( document.download_form.ip )
	document.download_form.ip.disabled = !genLicSelected;

	var emailText = findDOM('emailText', 0);
	if ( emailRequired || majordomoSelected || genLicSelected ) {
		emailText.innerText = 'Email (required):';
		emailText.textContent = 'Email (required):';
	}
	else {
		emailText.innerText = 'Email:';
		emailText.textContent = 'Email:';
	}
}

function dl_verify(emailRequired) {
	if ( document.download_form.gen_license && document.download_form.gen_license.checked ) {
		if ( ! ipCheck(document.download_form.ip.value) ) {
			return false;
		}
	}
	
	if ( (document.download_form.majordomo && document.download_form.majordomo.checked) ||
	 	 (document.download_form.gen_license && document.download_form.gen_license.checked) ||
	 	 emailRequired ) {
		if ( ! emailCheck(document.download_form.email.value) )
		{
			return false;
		}
	}
	
	return true;
}

function growl_error(msg) {
	Growl.Bezel( {title:'Error', image:'/images/growl/error.png', text:msg, duration:3} );
}

function ipCheck(ipStr) {
	var ipPat = /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;

	var ipA = ipStr.match(ipPat);

	if (ipA != null) {

		// this is an IP address

		for (var i=1;i<=4;i++) {
			if (ipA[i]>255) {
				growl_error("The IP address is invalid");
				return false;
			}
		}
		return true;
	}
	else {
		growl_error("A valid IP is required to issue the license.")
		return false;
	}	
}

// Sandeep V. Tamhankar (stamhankar@hotmail.com)
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. */

	if (emailStr == "") {
		growl_error("The email address is missing.");
		return false;
	}

	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. */

		growl_error("The email address is invalid.");
		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) {
			growl_error("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			growl_error("Ths domain name contains invalid characters.");
			return false;
		}
	}

	// See if "user" is valid 

	if (user.match(userPat)==null) {

		// user is not valid

		growl_error("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) {
				growl_error("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) {
			growl_error("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) {
			growl_error("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) {
		growl_error("This address is missing a hostname.");
		return false;
	}

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