Q1630 How can I find the major and minor version of the JavaScript support in Internet Explorer?

<script language="JScript"><!--
var majorVersion;
var minorVersion;

if (typeof(ScriptEngineMajorVersion) + '' == 'undefined') {
  majorVersion = 1;
  minorVersion = 0;
}
else {
  majorVersion = ScriptEngineMajorVersion();
  minorVersion = ScriptEngineMinorVersion();
}

//--></script>