Very interesting utility.

Very interesting utility. I can think of a couple uses for something like this already. Note that your example didn't work as the file named starpage misspelled "example.php". Also should rename starpage to something that will automatically load like "index.html" or similar.
My test broke when sumitting a form that used a relative url and "get" instead of "post". Not sure which one was the problem though.
Is there any way to handle webpages that use flash? This didn't work for me either.

Good work, I'll be watching this one!

it can not understood get method.
but i think i already know how to fix it)
And in not understood flash. But in future will.

For me, on my only attempt to use it so far, it failed on a POST with a relative url.

The source page was a modestly complex aspx/javascript page.

Oh... failed on google as well when I tested. Did I do something wrong. I just used the example script (example.php name corrected) on a local testing server.