Consider a compact Hausdorff topological space Omega, a JB*-triple E and F
:= C(Omega, E), the JB*-triple of all continuous E-valued functions f: Omeg
a --> E with the pointwise operations and the norm of the supremum. Let G b
e the group of all holomorphic automorphisms of the unit ball B-F of F that
map every equicontinuous subset lying strictly inside B-F into another suc
h a set. The real Banach-Lie group G and its Lie algebra are investigated.
The identity connected component of G is identified when E has the strong B
anach-Stone property. This extends to the infinite dimensional setting a we
ll known result concerning the case E = C.