  We define a new kind quantized enveloping algebra of a generalized Kac-Moody
algebra ${\mathcal G}$ by adding a new generator $J$ satisfying $J^m=J$ for
some integer $m$. We denote this algebra by $wU_q^{\tau}({\mathcal G})$. This
algebra is a weak Hopf algebra if and only if $m=2,3$. In general, it is a
bialgebra, and contains a Hopf subalgebra. This Hopf subalgebra is isomorphic
to the usually quantum envelope algebra $U_q({\mathcal G})$ of a generalized
Kac-Moody algebra ${\mathcal G}$.
