function DateUpdate(select_el, date)
{
	for (var i = 0; i < select_el.options.length; i++)
	{
		if (select_el.options[i].value == date)
			select_el.options[i].selected = true;
	}
}
function ValidateEmail(email)
{
	var pattern = /^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$/;
	if (pattern.test(email)) return true;
	return false;
}
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 isArray(obj){return(typeof(obj.length)=="undefined")?false:true;}

function changeLang(l)
{
	var f = document.forms['chlang'];
	if (l == 'en') f.lang.value = 'en';
	else if (l == 'de') f.lang.value = 'de';
	f.submit();
}