[R] p value from F value and dfs

[Sascha Wolfer]

Dear List,

is there an easy and fast way to compute the p value from a given F  
value and given degrees of freedom for an effect and the dfs for the  
residuals? I think of a function like this:

compute.p(F.value, numerator.dfs, denominator.dfs)

which returns the p value.

Thanks,
Sascha