var stuff="  Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do:  once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, `and what is the use of a book,' thought Alice  without pictures or conversation?'"
var words = stuff.split(" ");
var line=new Array;
var lines=new Array;
var letters=0;
var word = ''
for (var i=0; i<words.length; i++) { 
  for (letters=0; letters<80; letters++) 
    {word = words.shift(); line.push(word); word ? letters = letters + word.length : letters++;}; 
  lines.push(line.join(" ")); letters=0; line=[];
};
lines.push(line.join(" "));
lines.join("\n");