  We consider two natural topologies on the space $S(X\times Y,Z)$ of all
separately continuous functions defined on the product of two topological
spaces $X$ and $Y$ and ranged into a topological or metric space $X$. These
topologies are the cross-open topology and the cross-uniform topology. We show
that these topologies coincides if $X$ and $Y$ are pseudocompacts and $Z$ is a
metric space. We prove that a compact space $K$ embeds into $S(X\times Y,Z)$
for infinite compacts $X$, $Y$ and a metrizable space $Z\supseteq\mathbb{R}$ if
and only if the weight of $K$ is less than the sharp cellularity of both spaces
$X$ and $Y$.
