var browserName = navigator.appName
var browserVersion = navigator.appVersion
var browserVersionNum = parseFloat(browserVersion)
var agt=navigator.userAgent

if ( browserName == "Netscape" && browserVersionNum <= 4.01)
{
window.location="hinweis.html"
}
else if ( browserName == "Microsoft Internet Explorer" && browserVersionNum < 4.00)
{
window.location="hinweis.html"
}