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Determine the JavaScript Version

This Stackoverflow answer demonstrates how the <script> element together with the language attribute can be used to determine the JavaScript version in a web browser.

<!DOCTYPE html>
<html>
<head>
  <title>Determine JavaScript Version</title>
</head>
<body>

<div id='ver' />

<script type    ="text/javascript"> var ver = 1.0;</script>
<script language="Javascript1.1"  >     ver = 1.1; </script>
<script language="Javascript1.2"  >     ver = 1.2; </script>
<script language="Javascript1.3"  >     ver = 1.3; </script>
<script language="Javascript1.4"  >     ver = 1.4; </script>
<script language="Javascript1.5"  >     ver = 1.5; </script>
<script language="Javascript1.6"  >     ver = 1.6; </script>
<script language="Javascript1.7"  >     ver = 1.7; </script>
<script language="Javascript1.8"  >     ver = 1.8; </script>
<script language="Javascript1.9"  >     ver = 1.9; </script>
<script type    ="text/javascript">
   document.getElementById('ver').innerHTML = 'JavaScript version is: ' + ver;
</script>

</body>
</html>

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