// -----------------------------------------------------------------------
// ------------------------------------ Ajax -----------------------------
// -----------------------------------------------------------------------
var url0         = "ajaxLeseDB.php";
var kategorien   = new Array();
var katSize      = new Array();
var para1, para2, indexKategorie, indexSize;

function countClicks (scriptName, countName) {
// --------------------------------------------------------
// ---  Ajax-Aufruf Click zaehlen
// --------------------------------------------------------
        para1 = 5;
        url = url0 + "?para1=5&para2=" + scriptName + "&para3=" + countName;
        req.open( "GET", url, true );
               req.onreadystatechange = meineCallbackFkt;
               req.send( null );
}
function merkRequest(element, id) {
// --------------------------------------------------------
// ---  Request merken im hidden Feld
// --------------------------------------------------------
  switch (id) {
        case 1:          if ( element.selectedIndex == (element.length - 1) )         // letztes Element (sonstige Artikel)
                                 document.Kleinanz.UKategorieHidden.value = 99;
                         else
                                 document.Kleinanz.UKategorieHidden.value = element.options[element.selectedIndex].value;
                         break;
        case 2:          document.Kleinanz.GroesseHidden.value = element.options[element.selectedIndex].value;
                         break;
        default:         break;
  }
}
function leseDBviaAjax(indexKat, indexUKat, indexGroesse) {
// --------------------------------------------------------
// ---  1. Ajax-Aufruf Unterkategorien holen
// --------------------------------------------------------
        indexKategorie   = indexKat;
        indexSize        = indexGroesse;

        para1 = 1;
        url = url0 + "?para1=1&para2="
                   + kategorien[indexKategorie]
                   + "&para3="
                   + indexUKat;

        req.open( "GET", url, true );
               req.onreadystatechange = meineCallbackFkt;
               req.send( null );
}
function meineCallbackFkt() {
// --------------------------------------------------------
// ---  Callback-Funktion für Ajax ------------------------
// --------------------------------------------------------
      if( 4 == req.readyState ) {
        if( 200 != req.status ) {
//          alert( "Fehler cb-Fkt Status=" + req.status + " Text=" + req.statusText );
        } else {
                if (para1 == 1){
                        document.getElementById("unterkategorieAusgabe").innerHTML        = req.responseText;
// --------------------------------------------------------
// ---                  2. Ajax-Aufruf Size holen
// --------------------------------------------------------
                        para1        = 3;
                        url = url0 + "?para1=" + para1
                                   + "&para2=" + katSize[indexKategorie]
                                   + "&para3=" + indexSize;

                        req.open( "GET", url, true );
                             req.onreadystatechange = meineCallbackFkt;
                             req.send( null );
                        }
                else
                if (para1 == 3){
                        document.getElementById("sizeAusgabe").innerHTML                = req.responseText;
                        }
        }
      }
    }
function initAjax() {
// --------------------------------------------------------
// ---  Init Ajax vor dem 1. Aufruf -----------------------
// --------------------------------------------------------
      try {
        if( window.XMLHttpRequest ) {
          req = new XMLHttpRequest();
        } else if( window.ActiveXObject ) {
          req = new ActiveXObject( "Microsoft.XMLHTTP" );
        } else {
          alert( "Ihr Webbrowser unterstuetzt leider kein Ajax!" );
        }
        if( req.overrideMimeType ) {
            req.overrideMimeType( 'text/xml' );
        }
      } catch( e ) {
        alert( "Fehler init: " + e );
      }
}