I have put the following code in the header:
<HTML>
<HEAD>
<script type="text/javascript">
function detectBrowser(){var browser=navigator.appName
var b_version=navigator.appVersion
var version=parseFloat(b_version)
if ((browser=="Safari"||browser=="Konqueror"||browser=="Microsoft Internet Explorer")
&& (version>=0)) {alert("Your browser environment is not fully supported!")}}
</script>
</HEAD>
<body onload="detectBrowser()">
</body>
</HTML>
The "Microsoft Internet Explorer" detection works on my PC. I just don't get it why the Safari and Konqueror detection does not. I have found the tip at
http://www.w3schools.com/js/js_browser.asp
