word wrap in css / js

Css yo!

.wordwrap {
    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+ */ 
}

Also I just found this article
http://www.impressivewebs.com/word-wrap-css3/

So you should use

.wordwrap {  
    word-wrap: break-word;
}  

.no_wordwrap {  
    word-wrap: normal;
}