image1= new Image();
 image1.src = "../images/bt_1b.gif";

 image2= new Image();
 image2.src = "../images/bt_2b.gif";

 image3= new Image();
 image3.src = "../images/bt_3b.gif";

 image4= new Image();
 image4.src = "../images/bt_4b.gif";


 image5= new Image();
 image5.src = "../images/bt_5b.gif";

 image6= new Image();
 image6.src = "../images/bt_6b.gif";


 image10= new Image();
 image10.src = "../images/scr_01.jpg";

 image11= new Image();
 image1.src = "../images/scr_02.jpg";

 image12= new Image();
 image12.src = "../images/scr_03.jpg";

 image13= new Image();
 image3.src = "../images/scr_04.jpg";

 image14= new Image();
 image14.src = "../images/scr_05.jpg";

 image15= new Image();
 image15.src = "../images/scr_06.jpg";

browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version < 2.0) { roll = 'false'; }
else if (browser_name == "Netscape" && browser_version == 2.0) { roll = 'false'; }
else if (browser_name == "Netscape" && browser_version >= 3.0) { roll = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version <= 2.0) { roll = 'false'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { roll = 'true'; }
else { roll = 'false'; }

function msover(img,ref) { if (roll == 'true') { document.images[img].src = ref; } }
function msout(img,ref)  { if (roll == 'true') { document.images[img].src = ref; } }
function msoup(img,ref)  { if (roll == 'true') { document.images[img].src = ref; } }
function msover2(img1,ref1,img2,ref2) { if (roll == 'true') 
	{ document.images[img1].src = ref1; document.images[img2].src = ref2; } }
function msout2(img1,ref1,img2,ref2) { if (roll == 'true')  
        { document.images[img1].src = ref1; document.images[img2].src = ref2; } }

 function extrFenster(info) { window.open(info, "Fenster", "height=350,width=410, directories=no,status=no,scrollbars=yes,resizeable=no,menubar=no,location=no,copyhistory=no,toolbar=no"); }