页面强制折行代码：

.wrap{
    white-space: pre; /* CSS2 */
    white-space: -moz-pre-wrap; /* Mozilla */
    white-space: -hp-pre-wrap; /* HP printers */
    white-space: -o-pre-wrap; /* Opera 7 */
    white-space: -pre-wrap; /* Opera 4-6 */
    white-space: pre-wrap; /* CSS 2.1 */
    white-space: pre-line; /* CSS 3 (and 2.1 as well, actually) */
    word-wrap: break-word; /* IE */
}

页面强制不折行代码：

.unwrap{
    white-space:nowrap;
}

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