var ROT13_table = new Array();

for(i = 0; i < 256; i++) {
    replacement = i;
    if(i >= 65 && i <= 90) {
        replacement = i + 13;
        if(replacement >= 90)
            replacement -= 26;
    } else if(i >= 97 && i <= 122) {
        replacement = i + 13;
        if(replacement >= 122)
            replacement -= 26;
    }
    ROT13_table[i] = String.fromCharCode(replacement);
}

function deobfuscate(input) {
    result = ''
    l = input.length
    
    for(i = 0; i < l; i++) {
        result += ROT13_table[input.charCodeAt(i)];
    }
    return result
}