Base64 decoder

I need a base64 encryption and decryption script for use on my site within current html.? Prefer a javascript if possible. ## Deliverables Rent A Coder requirements notice: As originally posted, this bid request does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite. 1. Limitation of 5,000 characters allowed to be encrypted or decrypted. 2. Three Functions: Encrypt, Decrypt and Clear Data 3. Make sure that decrypted code cannot be executable on server? - text output only.