//sicht-bar, Peter Pruzina (www.sicht-bar.at)

function replaceAll(txt, find, ersetz)
{
	var x = txt.indexOf(find);
	while (x != -1)
	{
		txt = txt.replace(find, ersetz)
		x = txt.indexOf(find);
	}
	return txt;
	
}

function keinPunkt(felder)
{
	for (var i = 0; i < felder.length; ++i)
	{
		tmp = felder[i].value;
		tmp = replaceAll(tmp, ".", "");
		felder[i].value = tmp;
	}
}

function nurZahl(t,min,max,kommastellen)
{
	var txt = "Das Feld '" + t.name + "' darf nicht leer bleiben.";
	if (t.value.length == 0)
	{
		t.focus();
		alert(txt);
 		return false;			
	}
	
	
	if (kommastellen > 0)
	{
		var chars = "0123456789,";
		var txt = "Bitte geben Sie im Feld '" + t.name + "' nur Ziffern und/oder ein Kommazeichen sowie keine Tausenderpunkte ein!";
	}
	else
	{
		var chars = "0123456789";
		var txt = "Bitte geben Sie im Feld '" + t.name + "' nur Ziffern ein!";
	}
	
	var txtmin = "Bitte geben Sie im  Feld '" + t.name + "' mindestens '" + min + "' ein!"
	var txtmax = "Bitte geben Sie im  Feld '" + t.name + "' höchstens '" + max + "' ein!"
	
	for (var Pos = 0; Pos < t.value.length; Pos++)
	{
		if (chars.indexOf(t.value.charAt(Pos)) == -1)
		{
			t.select();
			t.focus();
			alert(txt);
 			return false;				
		}
	}
	
	//nache Kommabeistrich zu Kommapunkt
	var tmp = t.value;
	tmp = replaceAll(tmp, ",", ".");
	//t.value = tmp;
	
	if (tmp < min)
	{
		t.select();
		t.focus();
		alert(txtmin);
		return false;
	}
	
	if (tmp > max)
	{
		t.select();
		t.focus();
		alert(txtmax);
 		return false;
	}
	
	return true;
	
}

function CheckEmail (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|ad|al|as|ao|aq|ar|aw|at|bs|bd|be|bj|by|ba|bv|io|bg|bi|kh|ca|ky|td|cn|cc|km|ck|hr|cy|dk|do|ec|sv|ee|fk|fj|fr|tf|gm|de|gi|gr|gd|gu|gn|gy|ht|hn|hu|in|ir|ie|it|jm|jo|ke|ki|kr|la|lb|lr|li|lu|mg|my|ml|mh|mr|mx|md|mn|ma|mm|nr|an|nt|nz|ne|nu|mp|om|pw|pg|pe|pn|pf|pr|re|ru|lc|sm|sn|sl|si|so|su|lk|pm|vc|sr|sz|ch|tj|tz|tg|to|tn|tm|tv|ua|uk|uy|uz|va|vn|vi|eh|yu|zm|af|dz|ad|ai|ag|am|au|az|bh|bb|bz|bm|bo|bw|br|bn|bf|bt|cm|cv|cf|cl|cx|co|cg|cr|cu|cs|dj|tp|eg|gq|et|fo|fi|fx|ga|ge|gh|gb|gl|gp|gt|gw|gf|hm|hk|is|id|iq|il|ci|jp|kz|kg|kp|kw|lv|ls|ly|lt|mo|mw|mv|mt|mq|mu|fm|mc|ms|mz|na|np|nl|nc|ni|ng|nf|no|pk|pa|py|ph|pl|pt|qa|ro|rw|ws|sa|sc|sg|sb|za|es|sh|st|sd|sj|se|sy|tw|th|tk|tt|tr|tc|ug|ae|us|um|vu|ve|vg|wf|ye|zr|zw|cz|sk)$/;

/* 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("Ungültige Email-Adresse (pr&uuml;fen Sie @ 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("Ungültige Zeichen im Usernamen.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
//alert("Ungültige Zeichen im Domänennamen.");
return false;
   }
}

// See if "user" is valid 

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

// user is not valid

//alert("Name ungültig.");
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(" IP Address ungültig!");
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("Ungültige Domäne.");
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("Ungültige TLD oder Land .");
return false;
}

// Make sure there's a host name preceding the domain.

if (len<2) {
//alert("Kein Host angegeben!");
return false;
}

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