  The anomalous Hall effect (AHE) of ferromagnetic thin films of
Sr$_{1-x}$Ca$_{x}$RuO$_3$ (0 $\leq x \leq$ 0.4) is studied as a function of $x$
and temperature $T$. As $x$ increases, both the transition temperature $T_c$
and the magnetization $M$ are reduced and vanish near $x \sim$ 0.7. For all
compositions, the transverse resistivity $\rho_{H}$ varies non-monotonously
with $T$, and even changes sign, thus violating the conventional expression
$\rho_{H}=R_o B + 4\pi R_s M(T)$ ($B$ is the magnetic induction, while $R_o$
and $R_s$ are the ordinary and anomalous Hall coefficients). From the rather
complicated data of $\rho_H$, we find a scaling behavior of the transverse
conductivity $\sigma_{xy}$ with $M(T)$, which is well reproduced by the
first-principles band calculation assuming the intrinsic origin of the AHE.
