多浏览器pre自动换行

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 */
}

pre{
#word-break: break-all;      /* Internet Explorer 7.0+ */
#word-wrap: break-word;      /* Internet Explorer 7.0+ */
_word-break: break-all;      /* Internet Explorer 6.0- */
_word-wrap: break-word;      /* Internet Explorer 6.0- */
}