experiment in cryptographic methods

hasher

javascript: (function() {
    var lowers = "abcdefghjkmnpqrstuvwxyz";
    var capitals = "ABCDEFGHJKLMNPQRSTUVWXYZ";
    var numbers = "123456789";
    var specials = '[(){$<#]\/?}>-=_+!*&@;:,.^%';
    var letters = lowers + capitals + numbers + specials;  
    function hash(input) {
        var hash = 0,
            i, chr, len;
        if (input.length == 0) return hash;
        for (i = 0, len = input.length; i < len; i++) {
            chr = input.charCodeAt(i);
            hash = ((hash << 5) - hash) + chr;
            hash = hash >>> 0;
        }
        return hash;
    }

    function generate(seed, length, available) {
        seed = seed % 2147483647;
        if (seed <= 0) {
            seed += 2147483646;
        }
        console.log("generating length " + length + " for seed " + seed);
        var output = "";
        var i;
        var index;
        for (i = 0; i < length; i++) {
            seed = seed * 16807 % 2147483647;
            index = seed % available.length;
            output = output + available.substring(index, index + 1);
        }
        return output;
    }


    function write(text) {
        console.log("writing:" + text);
        return text;
    }

    function route(input) {
        console.log("generating hash for: " + input);
        hashed = hash(input);
        var generated = generate(hashed, outputLength, letters);
        return generated;
    }
    input = prompt('input', '');
  	var outputLength = prompt('length', '');
    prompt('result', route(input))
})()