JavaScript Tutorial/MS JScript/x86
@_x86
The @_x86 variable determines if a Intel processor is being used. When the variable is not true, it is defined as NaN.
<html>
<script language="JScript">
<!--
@if (@_x86)
alert("You are using an Intel processor.");
@else
alert("You are NOT using an Intel processor.");
@end
-->
</script>
</html>