pre保持原格式但文本不超出的解决方案

pre {

white-space: pre-wrap; /*css-3*/

white-space: -moz-pre-wrap; /*Mozilla,since1999*/

white-space: -pre-wrap; /*Opera4-6*/

white-space: -o-pre-wrap; /*Opera7*/

word-wrap: break-word; /*InternetExplorer5.5+*/

}