if(document.images) {

  image01 = new Image;
  image02 = new Image;
  image11 = new Image;
  image12 = new Image;
  image21 = new Image;
  image22 = new Image;
  image31 = new Image;
  image32 = new Image;
  image41 = new Image;
  image42 = new Image;
  image51 = new Image;
  image52 = new Image;
  image61 = new Image;
  image62 = new Image;
  image71 = new Image;
  image72 = new Image;

// source images

  image01.src = "http://www.koelnpickup.de/Images/bu_1.gif";
  image02.src = "http://www.koelnpickup.de/Images/bu_1_a.gif";
  image11.src = "http://www.koelnpickup.de/Images/bu_2.gif";
  image12.src = "http://www.koelnpickup.de/Images/bu_2_a.gif";
  image21.src = "http://www.koelnpickup.de/Images/bu_3.gif";
  image22.src = "http://www.koelnpickup.de/Images/bu_3_a.gif";
  image31.src = "http://www.koelnpickup.de/Images/bu_4.gif";
  image32.src = "http://www.koelnpickup.de/Images/bu_4_a.gif";
  image41.src = "http://www.koelnpickup.de/Images/bu_5.jpg";
  image42.src = "http://www.koelnpickup.de/Images/bu_5_a.jpg";
  image51.src = "http://www.koelnpickup.de/Images/bu_6.jpg";
  image52.src = "http://www.koelnpickup.de/Images/bu_6_a.jpg";
  image61.src = "http://www.koelnpickup.de/Images/bu_7.jpg";
  image62.src = "http://www.koelnpickup.de/Images/bu_7_a.jpg";
  image71.src = "http://www.koelnpickup.de/Images/bu_8.jpg";
  image72.src = "http://www.koelnpickup.de/Images/bu_8_a.jpg";


}

// MouseOver Function

function swapOn(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "2.src");
  }
}

// MouseOut Function

function swapOff(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "1.src");
  }
}

function FensterAuf(URL) 
{ 
 var breite=screen.availWidth; 
 var hoehe=screen.availHeight;

fenster1=window.open(URL,'Bildanzeige','fullscreen=0,width='+breite+',height='+hoehe+',toolbar=0,directories=0,status=1,scrollbars=1,resizable=1,menubar=0,locationbar=0');
}