cowsay.js

var cowsay = function (thought) {
    var scale = 40;

    var len = thought.length;
    var columns = scale < len ? scale : len;
    var rows;

    var top = "__";
    var bot = "--";
    for (var i = 0; i < columns; i++) {
	top += "_";
	bot += "-";
    }

    var line = new Array();
    for (rows = 0; len > 0; rows++) {
	line[rows] = thought.substr(rows * scale, scale < len ? scale : len);
	len -= scale;
    }
    if (rows === 1) {
	line[0] = "< " + line[0] + " >";
    } else {
	var space = "";
	for (; len < 0; len++)
	    space += " ";
	line[0] = "/ " + line[0] + " \\";
	line[rows-1] = "\\ " + line[rows-1] + space + " /";
	for (var i = 1; i < rows - 1; i++) {
	    line[i] = "| " + line[i] + " |";
	}
    }

    var cow = "\
        \\   ^__^\n\
         \\  (oo)\\_______\n\
            (__)\\       )\\/\\\n\
                ||----w |\n\
                ||     ||";

    var say = "";
    for (var i = 0; i < rows; i++)
	say += line[i] + "\n";
    say = " " + top + "\n" + say + " " +  bot + "\n" + cow;
    return say;
};