Browser Detect in Java Script

<html>
<head>
<script type="text/javascript">
function detectBrowser()
{
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
if ((browser=="Netscape"||browser=="Microsoft Internet Explorer")
&& (version>=4))
{
alert("You are having a Recent Browser!");
}
else
{
alert("It's time to upgrade your browser!");
}
}
</script>
</head>
<body onload="detectBrowser()">
</body>
</html>

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Installing ns3 in Ubuntu 22.04 | Complete Instructions

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Installation of NS2 (ns-2.35) in Ubuntu 20.04

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NS2 Installation in Ubuntu 22.04

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