var browser = navigator.userAgent.toLowerCase();
var ganzzahl = parseInt(navigator.appVersion);
var genauezahl = parseFloat(navigator.appVersion);
//ist es netscape
var netscap = ((browser.indexOf('mozilla')!=-1) && (browser.indexOf('spoofer')==-1) && (browser.indexOf('compatible') == -1) && (browser.indexOf('opera')==-1) && (browser.indexOf('webtv')==-1) && (browser.indexOf('hotjava')==-1));
var netscap4 = (netscap && (ganzzahl == 4));

var netscap6up = (netscap && (ganzzahl >= 5));

if ( netscap4 )
document.write('<script type=text/javascript src=./js/nsc4x.js></script>')
else
document.write('<script type=text/javascript src=./js/andere_browser.js></script>')