test.js

var sys = require("sys");
var fs = require("fs");

var decode = function (utftext) {
	var string = "";
    var i = 0;
    var c = c1 = c2 = 0;

    while ( i < utftext.length ) {
        c = utftext.charCodeAt(i);
        if (c < 128) {
            string += String.fromCharCode(c);
            i++;
        }
        else if((c > 191) && (c < 224)) {
            c2 = utftext.charCodeAt(i+1);
            string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
            i += 2;
        }
        else {
            c2 = utftext.charCodeAt(i+1);
            c3 = utftext.charCodeAt(i+2);
            string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
            i += 3;
        }
    }
    return string;
};


fs.readFile('base.html', "binary", function (err, data) {
	if (err) throw err;
	sys.puts(typeof(data));
	fs.writeFile("out.html", decode(data), "utf8", function(err) {});
});