mixcas

var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
function base64_decode(input){
    var output = new Array();
    var chr1, chr2, chr3;
    var enc1, enc2, enc3, enc4;
    var i = 0;

    var orig_input = input;
    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
    if (orig_input != input)