if (navigator.appVersion.indexOf("2.") != -1){
        check = false;
        }
if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){
        check = false;
        }
else {
        check = true;
        }

origimage = new Image();
origimage.src = "images/bl/karte-deutschland.gif";

image1on = new Image();
image1on.src = "images/bl/karte-rotlicht-mv.gif";
image2on = new Image();
image2on.src = "images/bl/karte-rotlicht-sh.gif";
image3on = new Image();
image3on.src = "images/bl/karte-redlight-hamburg.gif";
image4on = new Image();
image4on.src = "images/bl/karte-rotlicht-bremen.gif";
image5on = new Image();
image5on.src = "images/bl/karte-rotlicht-niedersachsen.gif";
image6on = new Image();
image6on.src = "images/bl/karte-rotlicht-berlin-brandenburg.gif";
image7on = new Image();
image7on.src = "images/bl/karte-berlin.gif";
image8on = new Image();
image8on.src = "images/bl/karte-rotlicht-sachsen-anhalt.gif";
image9on = new Image();
image9on.src = "images/bl/karte-sachsen-rotlicht.gif";
image10on = new Image();
image10on.src = "images/bl/karte-rotlicht-thueringen.gif";
image11on = new Image();
image11on.src = "images/bl/karte-thueringen.gif";
image12on = new Image();
image12on.src = "images/bl/karte-thueringen.gif";
image13on = new Image();
image13on.src = "images/bl/karte-thueringen.gif";
image14on = new Image();
image14on.src = "images/bl/karte-thueringen.gif";
image15on = new Image();
image15on.src = "images/bl/karte-thueringen.gif";
image16on = new Image();
image16on.src = "images/bl/karte-thueringen.gif";

function imageon(name)   {
        document.altimg.src = eval(name + "on.src");
}
function imageoff(name)  {
        document.altimg.src = eval(name + ".src");
}

function on(name)  {
        if (check == true){
        imageon(name);
        }
}
function off(name)  {
        if (check == true){
        imageoff(name);
        }
}