超出部分自动换行兼容多浏览器

<style type="text/css">
.linebr {
clear: both; / 清除左右浮动 /
width: 100px; / 必须定义宽度 /
word-break: break-word; / 文本行的任意字内断开 /
word-wrap: break-word; / IE /
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; / CSS2 /
white-space: pre-wrap; / CSS 2.1 /
white-space: pre-line; / CSS 3 (and 2.1 as well, actually) /
}
</style>