// *** DEFINE BROWSER AND PLATFORM ***
function Is ()
{
        // convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase()

        // *** BROWSER VERSION ***
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

        // *** BROWSER VERSION ***
     var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav2 = (is_nav && (is_major == 2));
    var is_nav3 = (is_nav && (is_major == 3));
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);


    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5")==-1) );
    var is_ie4up  = (is_ie  && (is_major >= 4));
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);

    // *** PLATFORM ***
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) )
    var is_mac   = (agt.indexOf("mac")!=-1)
<!--
// *** DYNAMICALLY WRITE APPROPRIATE STYLESHEET ***
//Windows Navigator 6 und höher
if (is_nav6up && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/ie5pcstyles.css" TYPE="text/css">');
}
//Windows Navigator 4 und höher
else if (is_nav4up && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/navpcstyles.css" TYPE="text/css">');
}
//Windows Navigator 4
else if (is_nav4 && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/navpcstyles.css" TYPE="text/css">');
}
//Windows IE 5 und höher
else if (is_ie5up && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/ie5pcstyles.css" TYPE="text/css">');
}
//Windows IE 4
else if (is_ie4 && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/iepcstyles.css" TYPE="text/css">');
}
//Windows IE 3
else if (is_ie3 && is_win)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/iepcstyles.css" TYPE="text/css">');
}
//Mac Navigator 6 oder höher
else if (is_nav6up && is_mac)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/ie5macstyles.css" TYPE="text/css">');
}
//Mac Navigator 4 oder höher
else if (is_nav4up && is_mac)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/nav4macstyles.css" TYPE="text/css">');
}
//Mac IE 5 oder höher
else if (is_ie5up && is_mac)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/ie5macstyles.css" TYPE="text/css">');
}
//Mac IE 4
else if (is_ie4up && is_mac)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/iemacstyles.css" TYPE="text/css">');
}
//Mac IE3
else if (is_ie3 && is_mac)
{
    document.write('<link REL=STYLESHEET HREF="stylesheets/iemacstyles.css" TYPE="text/css">');
}
else
{
        document.write('<link REL=STYLESHEET HREF="stylesheets/default_styles.css" TYPE="text/css">');
}


} // end function is

Is();

// end of finding right stylesheet code

function NeuesFenster(datei,name,parameter){
bild = window.open(datei,name,parameter);
bild.focus();
}