Q42 How do I detect the version of JavaScript the users browser supports?

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Try the following:

<script language="JavaScript"><!--
var version = 1;
//--></script>

<script language="JavaScript1.1"><!--
var version = 1.1;
//--></SCRIPT>

<script language="JavaScript1.2"><!--
var version = 1.2;
//--></script>

<script language="JavaScript"><!--
document.write('Your browser supports JavaScript ' + version);
//--></script>