  Motivated by a recent argument that the superconducting (SC) transition field
of three-dimensional (3D) disordered superconductors with granular structure in
a nonzero magnetic field should lie above $H_{c2}(0)$ in low $T$ limit, the
glass transition (or, in 2D, crossover) curve $H_g(T)$ of disordered quantum
Josephson junction arrays is examined by incorporating SC fluctuations. It is
found that the glass transition or crossover in the granular materials can be
described on the same footing as the vortex-glass (VG) transition in
amorphous-like (i.e., nongranular) materials. In most of 3D granular systems,
the vanishing of resistivity upon cooling should occur even above $H_{c2}(0)$,
while the corresponding sharp drop of the resistivity in 2D case may appear
only below $H_{c2}$ as a result of an enhanced quantum fluctuation.
