[Webtest] Ignoring responses returned from iframes embeded in html pages ...

[Adrian Porter]

I have an html frame which contains an Iframe.  The Iframe is a 
single-pixel frame that polls the server every 4 minutes.  It generates a 
response that become the new current response, taking the script focus 
away from the response of interest - i.e.  the html container page.  Is 
there a way to disable or ignore processing of responses from iframes ?