base64.js

Base64加密解密的javascript版本

        enc4 = chr3 & 63;

        if (isNaN(chr2))
        {
            enc3 = enc4 = 64;
        }
        else if(isNaN(chr3))
        {
            enc4 = 64;
        }

        output = output + 
        keyStr.charAt(enc1) + 
        keyStr.charAt(enc2) + 
        keyStr.charAt(enc3) + 
        keyStr.charAt(enc4);
        chr1 = chr2 = chr3 = "";
        enc1 = enc2 = enc3 = enc4 = "";
        
    }while(i < input.length);