Below is the source

<script language="JavaScript">
<!--
browser_version= parseInt(navigator.appVersion);
browser_type = navigator.appName;

if (browser_type == "Microsoft Internet Explorer" && (browser_version >= 4)) {
document.write("You appear to be using Microsoft Internet Explorer");
} 
else if (browser_type == "Netscape" && (browser_version >= 4)) {
document.write("You appear to be using Netscape");
}
// -->
</script>