How to obtain t-values from mer objects

Try summary(fm1)

Andrzej

I know how to obtain the fixed effects from a mer object:

(fm1<- lmer(Reaction ~ Days + (Days|Subject), sleepstudy))

fixef(fm1)

or,

getME(fm1, 'beta')

But how can I obtain the t-statistic values for the fixed effects?

Thanks,
Gang