CSS实现pre标签中内容换行方法

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+ */
overflow: auto;
word-break: break-all;
word-wrap: break-word;
}