// Plass Data Software A/S
// 2001 09 13

// Copyright (C) 2001 René Jørgensen
// Available at http://www.plass.dk

function findParams(aForm,aMinLenght, aMaxLenght)
{
  var aParam = "";
  var aNavn = "";
  var aValue = "";
  var MinLen = 0;
  var MaxLen = 0;
  MinLen = parseInt(validCharOnly("0"+aMinLenght,"0123456789"));
  MaxLen = parseInt(validCharOnly("0"+aMaxLenght,"0123456789"));
  if (MaxLen==0) { MaxLen=99; }
  for (var i = 0; i < aForm.length; i++) 
  {
    aNavn=aForm.elements[i].name;  
    aValue=""+aForm.elements[i].value;  
//    aValue=validate(aValue);
    if ((aValue != "") && (aNavn.length<MaxLen)) {
      if (aValue.length > MinLen && aNavn.length>MinLen) { aParam += aNavn+"="+escape(aValue)+"&";}      
    }
//    else{ alert(aNavn+"er tom")}
  }
  return aParam
}

function removeChar(aStr,aRemoveChars) {
  var newvalue = "";
  var temp;
  if (aStr==null) { aStr=""; }
  for (var i=0; i<aStr.length; i++) {
  temp = "" + aStr.substring(i, i+1);
  if (aRemoveChars.indexOf(temp) == "-1") { newvalue+=temp;}
  } 
  return newvalue;
}


// "erstat" tekst med godkendte tegn
function validCharOnly(aText,aValidChars) {
 var newvalue = "";
 var temp; 
 for (var i=0; i<aText.length; i++) {
   temp = "" + aText.substring(i, i+1);
   if (aValidChars.indexOf(temp) != "-1") { newvalue+=temp;}
 } 
 return newvalue;  
}

// "erstat" tekst med tal ved forkert indtastning på felt
function validNumFieldFormat(aThis) {
  number = '' + validNumField(aThis,false);
  if (number.length > 3) {
    var mod = number.length % 3;
    var output = (mod > 0 ? (number.substring(0,mod)) : '');
    for (i=0 ; i < Math.floor(number.length / 3); i++) {
      if ((mod == 0) && (i == 0))
        output += number.substring(mod+ 3 * i, mod + 3 * i + 3);
      else
        output+= '.' + number.substring(mod + 3 * i, mod + 3 * i + 3);
    }
    aThis.value = output;
    return (output);
  }
  else {
    aThis.value = number;
    return number;
  }
}

// "erstat" tekst med tal ved forkert indtastning på felt
function validNumField(aThis,aFocus) {
 var newvalue="";
 newvalue=validCharOnly(aThis.value,"0123456789");
 if (newvalue=="") { newvalue="0"}
 aThis.value = newvalue
 if (aFocus) { aThis.select(); }
 return newvalue;  
}

function validTextField(aThis,aFocus){
  var newvalue="";
  newvalue=removeChar(aThis.value,"'\"");
  aThis.value = newvalue
  if (aFocus) { aThis.select(); }
  return newvalue;  
}

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("Email adressen mangler (@)")
 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("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
var domainArray=domain.match(domainPat)
if (domainArray==null) {
 alert("Domain navn er ikke gyldigt.")
    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>4) {
   // the address must end in a two letter or three letter word.
   alert("Adressen mangler tre/fire-bogstaver for domain, eller to bogstaver for land.")
   return false
}

// Make sure there's a host name preceding the domain.
if (len<2) {
   var errStr="Denne adresse mangler et hostnavn!"
   alert(errStr)
   return false
}

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