// Datei utility_funktionen.js 

// Ajax-Objekt erzeugen
function ErzeugeAJAXObjekt()
{
  this.erzXMLHttpRequestObject = erzXMLHttpRequestObject;
}

// Kommunikationsobjekt fuer Ajax erzeugen
function erzXMLHttpRequestObject()
{
  var resObjekt = null;
  try {
    resObjekt = new ActiveXObject("Microsoft.XMLHTTP");
  }
  catch(Error){
    try {
      resObjekt = new ActiveXObject("MSXML2.XMLHTTP");
    }
    catch(Error){
      try {
      resObjekt = new XMLHttpRequest();
      }
      catch(Error){
        alert(
          "Erzeugung des XMLHttpRequest-Objekts ist nicht moeglich.");
      }
    }
  }
  return resObjekt;
}

// Code from http://ostermiller.org/calc/encode.html
// This program is free software ... and under the terms of the GNU General Public License
// BEGIN

function urlDecode(str){
    str=str.replace(new RegExp('\\+','g'),' ');
    return unescape(str);
}
function urlEncode(str){
    str=escape(str);
    str=str.replace(new RegExp('\\+','g'),'%2B');
    return str.replace(new RegExp('%20','g'),'+');
}

var END_OF_INPUT = -1;

var base64Chars = new Array(
    'A','B','C','D','E','F','G','H',
    'I','J','K','L','M','N','O','P',
    'Q','R','S','T','U','V','W','X',
    'Y','Z','a','b','c','d','e','f',
    'g','h','i','j','k','l','m','n',
    'o','p','q','r','s','t','u','v',
    'w','x','y','z','0','1','2','3',
    '4','5','6','7','8','9','+','/'
);

var reverseBase64Chars = new Array();
for (var i=0; i < base64Chars.length; i++){
    reverseBase64Chars[base64Chars[i]] = i;
}

var base64Str;
var base64Count;

function setBase64Str(str){
    base64Str = str;
    base64Count = 0;
}

function readBase64(){    
    if (!base64Str) return END_OF_INPUT;
    if (base64Count >= base64Str.length) return END_OF_INPUT;
    var c = base64Str.charCodeAt(base64Count) & 0xff;
    base64Count++;
    return c;
}

function encodeBase64(str){
    setBase64Str(str);
    var result = '';
    var inBuffer = new Array(3);
    var lineCount = 0;
    var done = false;
    while (!done && (inBuffer[0] = readBase64()) != END_OF_INPUT){
        inBuffer[1] = readBase64();
        inBuffer[2] = readBase64();
        result += (base64Chars[ inBuffer[0] >> 2 ]);
        if (inBuffer[1] != END_OF_INPUT){
            result += (base64Chars [(( inBuffer[0] << 4 ) & 0x30) | (inBuffer[1] >> 4) ]);
            if (inBuffer[2] != END_OF_INPUT){
                result += (base64Chars [((inBuffer[1] << 2) & 0x3c) | (inBuffer[2] >> 6) ]);
                result += (base64Chars [inBuffer[2] & 0x3F]);
            } else {
                result += (base64Chars [((inBuffer[1] << 2) & 0x3c)]);
                result += ('=');
                done = true;
            }
        } else {
            result += (base64Chars [(( inBuffer[0] << 4 ) & 0x30)]);
            result += ('=');
            result += ('=');
            done = true;
        }
        lineCount += 4;
        if (lineCount >= 76){
            result += ('\n');
            lineCount = 0;
        }
    }
    return result;
}
function readReverseBase64(){   
    if (!base64Str) return END_OF_INPUT;
    while (true){      
        if (base64Count >= base64Str.length) return END_OF_INPUT;
        var nextCharacter = base64Str.charAt(base64Count);
        base64Count++;
        if (reverseBase64Chars[nextCharacter]){
            return reverseBase64Chars[nextCharacter];
        }
        if (nextCharacter == 'A') return 0;
    }
    return END_OF_INPUT;
}

function ntos(n){
    n=n.toString(16);
    if (n.length == 1) n="0"+n;
    n="%"+n;
    return unescape(n);
}

function decodeBase64(str){
    setBase64Str(str);
    var result = "";
    var inBuffer = new Array(4);
    var done = false;
    while (!done && (inBuffer[0] = readReverseBase64()) != END_OF_INPUT
        && (inBuffer[1] = readReverseBase64()) != END_OF_INPUT){
        inBuffer[2] = readReverseBase64();
        inBuffer[3] = readReverseBase64();
        result += ntos((((inBuffer[0] << 2) & 0xff)| inBuffer[1] >> 4));
        if (inBuffer[2] != END_OF_INPUT){
            result +=  ntos((((inBuffer[1] << 4) & 0xff)| inBuffer[2] >> 2));
            if (inBuffer[3] != END_OF_INPUT){
                result +=  ntos((((inBuffer[2] << 6)  & 0xff) | inBuffer[3]));
            } else {
                done = true;
            }
        } else {
            done = true;
        }
    }
    return result;
}

var digitArray = new Array('0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f');
function toHex(n){
    var result = ''
    var start = true;
    for (var i=32; i>0;){
        i-=4;
        var digit = (n>>i) & 0xf;
        if (!start || digit != 0){
            start = false;
            result += digitArray[digit];
        }
    }
    return (result==''?'0':result);
}

function pad(str, len, pad){
    var result = str;
    for (var i=str.length; i<len; i++){
        result = pad + result;
    }
    return result;
}

function encodeHex(str){
    var result = "";
    for (var i=0; i<str.length; i++){
        result += pad(toHex(str.charCodeAt(i)&0xff),2,'0');
    }
    return result;
}

var hexv = {
  "00":0,"01":1,"02":2,"03":3,"04":4,"05":5,"06":6,"07":7,"08":8,"09":9,"0A":10,"0B":11,"0C":12,"0D":13,"0E":14,"0F":15,
  "10":16,"11":17,"12":18,"13":19,"14":20,"15":21,"16":22,"17":23,"18":24,"19":25,"1A":26,"1B":27,"1C":28,"1D":29,"1E":30,"1F":31,
  "20":32,"21":33,"22":34,"23":35,"24":36,"25":37,"26":38,"27":39,"28":40,"29":41,"2A":42,"2B":43,"2C":44,"2D":45,"2E":46,"2F":47,
  "30":48,"31":49,"32":50,"33":51,"34":52,"35":53,"36":54,"37":55,"38":56,"39":57,"3A":58,"3B":59,"3C":60,"3D":61,"3E":62,"3F":63,
  "40":64,"41":65,"42":66,"43":67,"44":68,"45":69,"46":70,"47":71,"48":72,"49":73,"4A":74,"4B":75,"4C":76,"4D":77,"4E":78,"4F":79,
  "50":80,"51":81,"52":82,"53":83,"54":84,"55":85,"56":86,"57":87,"58":88,"59":89,"5A":90,"5B":91,"5C":92,"5D":93,"5E":94,"5F":95,
  "60":96,"61":97,"62":98,"63":99,"64":100,"65":101,"66":102,"67":103,"68":104,"69":105,"6A":106,"6B":107,"6C":108,"6D":109,"6E":110,"6F":111,
  "70":112,"71":113,"72":114,"73":115,"74":116,"75":117,"76":118,"77":119,"78":120,"79":121,"7A":122,"7B":123,"7C":124,"7D":125,"7E":126,"7F":127,
  "80":128,"81":129,"82":130,"83":131,"84":132,"85":133,"86":134,"87":135,"88":136,"89":137,"8A":138,"8B":139,"8C":140,"8D":141,"8E":142,"8F":143,
  "90":144,"91":145,"92":146,"93":147,"94":148,"95":149,"96":150,"97":151,"98":152,"99":153,"9A":154,"9B":155,"9C":156,"9D":157,"9E":158,"9F":159,
  "A0":160,"A1":161,"A2":162,"A3":163,"A4":164,"A5":165,"A6":166,"A7":167,"A8":168,"A9":169,"AA":170,"AB":171,"AC":172,"AD":173,"AE":174,"AF":175,
  "B0":176,"B1":177,"B2":178,"B3":179,"B4":180,"B5":181,"B6":182,"B7":183,"B8":184,"B9":185,"BA":186,"BB":187,"BC":188,"BD":189,"BE":190,"BF":191,
  "C0":192,"C1":193,"C2":194,"C3":195,"C4":196,"C5":197,"C6":198,"C7":199,"C8":200,"C9":201,"CA":202,"CB":203,"CC":204,"CD":205,"CE":206,"CF":207,
  "D0":208,"D1":209,"D2":210,"D3":211,"D4":212,"D5":213,"D6":214,"D7":215,"D8":216,"D9":217,"DA":218,"DB":219,"DC":220,"DD":221,"DE":222,"DF":223,
  "E0":224,"E1":225,"E2":226,"E3":227,"E4":228,"E5":229,"E6":230,"E7":231,"E8":232,"E9":233,"EA":234,"EB":235,"EC":236,"ED":237,"EE":238,"EF":239,
  "F0":240,"F1":241,"F2":242,"F3":243,"F4":244,"F5":245,"F6":246,"F7":247,"F8":248,"F9":249,"FA":250,"FB":251,"FC":252,"FD":253,"FE":254,"FF":255
};

function decodeHex(str){
    str = str.toUpperCase().replace(new RegExp("s/[^0-9A-Z]//g"));
    var result = "";
    var nextchar = "";
    for (var i=0; i<str.length; i++){
        nextchar += str.charAt(i);
        if (nextchar.length == 2){
            result += ntos(hexv[nextchar]);
            nextchar = "";
        }
    }
    return result;
    
}

// Code from http://ostermiller.org/calc/encode.html
// This program is free software ... and under the terms of the GNU General Public License
// END


// Verschluesselung fuer Ajax-Datentransfer
function my_encode(str)
{
   str=encodeURIComponent(encodeBase64(str));
   return str;
}

// Eingabetexte auf erlaubte Zeichen pruefen 
function myCheckInput(zuname,vorname,telefon,email,adresse,info)
{
   re_name=/^[a-zA-Z�����\-\s]{2,50}$/; 
   re_telefon=/^[0-9/\s]{5,100}$/; 
   re_email=/^[0-9a-zA-Z]{2,80} [0-9a-zA-Z]{2,19}$/; 
   re_adresse=/^[a-zA-Z0-9�����:;_/\-\.\s]{1,100}$/; 
   re_info=/^[a-zA-Z0-9�����:;,+<>(){}_/*?~$�'#\\"!&%\-\.\s\[\]]{1,100}$/; 

   // zuname pruefen
   
   if (zuname.length == 0)
   {
      alert("Bitte Zuname eingeben.");
      return false;
   }

   if (!re_name.test(zuname))
   {
      alert("Fehlerhafte Eingabe im Feld  'Zuname'.");
      return false;
   }

   // vorname pruefen
   if (vorname.length == 0)
   {
      alert("Bitte Vorname eingeben.");
      return false;
   }

   if (!re_name.test(vorname))
   {
      alert("Fehlerhafte Eingabe im Feld  'Vorname'.");
      return false;
   }

   // telefon pruefen
   if (telefon.length == 0)
   {
      alert("Bitte Telefonnummer eingeben.");
      return false;
   }

   if (!re_telefon.test(telefon))
   {
      alert("Fehlerhafte Eingabe im Feld  'Telefon'.");
      return false;
   }

   // email pruefen, darf auch leer sein
   if (email.length !=0)
   {
      if (!re_email.test(email))
      {
         alert("Fehlerhafte Eingabew im Feld  'E-Mail'.");
         return false;
      }
   }

   // adresse pruefen, darf auch leer sein
   if (adresse.length !=0)
   {
      if (!re_adresse.test(adresse))
      {
         alert("Fehlerhafte Eingabe im Feld  'Adresse'.");
         return false;
      }
   }

   // info pruefen, darf auch leer sein
   if (info.length !=0)
   {
      if (!re_info.test(info))
      {
         alert("Fehlerhafte Eingabe im Feld  'Bemerkung'.");
         return false;
      }
   }

   // alle Eingaben formal in Ordnung
   return true;
}

/* Ajax Style File Uploading using Hidden iFrame
   Javascript-Function fileUpload() was found in internet: 

   http://viralpatel.net/blogs/ajax-style-file-uploading-using-hidden-iframe/

   File uploading using AJAX is not possible. AJAX does not actually post forms to the server, 
   it sends selected data to the server in the form of a POST or GET request. 
   As javascript is not capable of grabbing the file from the users machine and sending it to the server, 
   it is just not possible with AJAX. You have to resort to regular old form submit.

   If you have read/seen it somewhere, then it is not through AJAX. File uploading occurs through
   an iframe in this case. You have to use a iframe to upload the files. So, you can use iframe to 
   asynchronous upload (Like AJAX , but its not AJAX).
*/

function myFileUpload(form, action_url, div_id) {
    // Create the iframe...
    var iframe = document.createElement("iframe");
    iframe.setAttribute("id", "upload_iframe");
    iframe.setAttribute("name", "upload_iframe");
    iframe.setAttribute("width", "0");
    iframe.setAttribute("height", "0");
    iframe.setAttribute("border", "0");
    iframe.setAttribute("style", "width: 0; height: 0; border: none;");
 
    // Add to document...
    form.parentNode.appendChild(iframe);
    window.frames['upload_iframe'].name = "upload_iframe";
 
    iframeId = document.getElementById("upload_iframe");
 
    // Add event...
    var eventHandler = function () { 
 
            if (iframeId.detachEvent) iframeId.detachEvent("onload", eventHandler);
            else iframeId.removeEventListener("load", eventHandler, false);
 
            // Message from server...
            if (iframeId.contentDocument) {
                content = iframeId.contentDocument.body.innerHTML;
            } else if (iframeId.contentWindow) {
                content = iframeId.contentWindow.document.body.innerHTML;
            } else if (iframeId.document) {
                content = iframeId.document.body.innerHTML;
            }
 
            document.getElementById(div_id).innerHTML = content;

            myGUIdisable(false); // change 

            // Del the iframe...
            setTimeout('iframeId.parentNode.removeChild(iframeId)', 250);
        }
 
    if (iframeId.addEventListener) iframeId.addEventListener("load", eventHandler, true);
    if (iframeId.attachEvent) iframeId.attachEvent("onload", eventHandler);
 
    // Set properties of form...
    form.setAttribute("target", "upload_iframe");
    form.setAttribute("action", action_url);
    form.setAttribute("method", "post");
    form.setAttribute("enctype", "multipart/form-data");
    form.setAttribute("encoding", "multipart/form-data");
 
    // Submit the form...
    form.submit();
 
    document.getElementById(div_id).innerHTML = "Bitte warten ..."; // changed 
}

function myGUIdisable(value)
{
   document.getElementsByName('zuname')[0].disabled=value;
   document.getElementsByName('vorname')[0].disabled=value;
   document.getElementsByName('telefon')[0].disabled=value;
   document.getElementsByName('email')[0].disabled=value;
   document.getElementsByName('adresse')[0].disabled=value;
   document.getElementsByName('info')[0].disabled=value;
   document.getElementsByName('knopf')[0].disabled=value;
   document.getElementsByName('bild')[0].disabled=value;
}

function sleep(milliseconds) {
  var start = new Date().getTime();
  for (var i = 0; i < 1e7; i++) {
    if ((new Date().getTime() - start) > milliseconds){
      break;
    }
  }
}