ISS's IPS and Javascript interpreter

As you've probably noticed, recently most malicious websites that host 
client-side browser exploits are not obfuscating them using complex javascript. 
i.e. if its an HTML-based attack, the HTML is dynamically generated using 
complex script. If its a call into a buggy activex complex, the call 
invocation, params etc are all obfuscated. 

The only way to detect such exploits over the wire is with a Javascript 
interpreter.

Does anyone know if ISS's IPS can detect such exploits. Comments from experts 
on other vendor's IPS products are also welcome.

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