火狐下pre标签如何换行

pre {white-space: pre-wrap; /* css-3 /white-space: -moz-pre-wrap; / Mozilla, since 1999 /white-space: -pre-wrap; / Opera 4-6 /white-space: -o-pre-wrap; / Opera 7 /word-wrap: break-word; / Internet Explorer 5.5+ */}