Integer random matrix with different ranges in matlab

How can one create a random matrix (say B) which element B(i,j) is a uniform random integer number in the close interval 0 and A(i,j). A is a given matrix. For example:

A = [6, 2, 5, 7;
     12, 0, 4, 0;
     8, 0, 10, 1;
     11, 6, 2, 5];