JavaScript Tutorial/MS JScript/jscript
@_jscript
The @_jscript variable determines if JScript is being used.
This variable is always true.
<html>
<script language="JScript">
<!--
@if (@_jscript)
alert("The @_jscript variable is true.");
@else
alert("The @_jscript variable is NOT true.");
@end
-->
</script>
</html>