jProfan

;function decode64(input) {

    ;var output=""
    ;var chr1,chr2,chr3=""
    ;var enc1,enc2,enc3,enc4=""
    ;var i=0
    ;var base64test=/[^A-Za-z0-9\+\/\=]/g
    ;if (base64test.exec(input)) input=input.replace(/[^A-Za-z0-9\+\/\=]/g, "")

    ;do {

        ;enc1 = basekeys.indexOf(input.charAt(i++))
        ;enc2 = basekeys.indexOf(input.charAt(i++))
        ;enc3 = basekeys.indexOf(input.charAt(i++))
        ;enc4 = basekeys.indexOf(input.charAt(i++))
        ;chr1 = (enc1 << 2) | (enc2 >> 4)
        ;chr2 = ((enc2 & 15) << 4) | (enc3 >> 2)
        ;chr3 = ((enc3 & 3) << 6) | enc4
        ;output = output + String.fromCharCode(chr1)
        ;if (enc3 != 64) output = output + String.fromCharCode(chr2)
        ;if (enc4 != 64) output = output + String.fromCharCode(chr3)
        ;chr1=chr2=chr3=""
        ;enc1=enc2=enc3=enc4=""

    ;} while (i<input.length)

    ;return unescape(output)