How to make an inner shadow effect on big font?

I want to make the effect as demonstrate on this site http://dropshadow.webvex.limebits.com/ with arguments - left:0 top:0 blur:1 opacity:1 examples:engraved font:sans serif

I have tried css text-shadow wit开发者_开发技巧h #333333 -1px -1px but seems not enough to make an inner shadow on such big font, it may be much more complex than i thought?

And worse is i'm using Cufon to replace the font but Cufon doesn't support blur of text-shadow

I guess maybe i should use JS to make this effect, but i doubt JS will work together with Cufon, or JS font replacement together with JS shadow maker?

Any ideas?

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http://cufon.shoqolate.com/examples/text-shadow.html