var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + //all caps
"abcdefghijklmnopqrstuvwxyz" + //all lowercase
"0123456789+/="; // all numbers plus +/=



function decode64(inp)
{
var out = ""; //This is the output
var chr1, chr2, chr3 = ""; //These are the 3 decoded bytes
var enc1, enc2, enc3, enc4 = ""; //These are the 4 bytes to be decoded
var i = 0; //Position counter

// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
// inp = inp.replace(/[^A-Za-z0-9+/=]/g, "");

do { //Here’s the decode loop.

//Grab 4 bytes of encoded content.
enc1 = keyStr.indexOf(inp.charAt(i++));
enc2 = keyStr.indexOf(inp.charAt(i++));
enc3 = keyStr.indexOf(inp.charAt(i++));
enc4 = keyStr.indexOf(inp.charAt(i++));

//Heres the decode part. There’s really only one way to do it.
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;

//Start to output decoded content
out = out + String.fromCharCode(chr1);

if (enc3 != 64) {
out = out + String.fromCharCode(chr2);
}
if (enc4 != 64) {
out = out + String.fromCharCode(chr3);
}

//now clean out the variables used
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";

} while (i < inp.length); //finish off the loop

//Now return the decoded values.
return out;
}

function rdct (topic, cl, title, text) {
    document.write('<a href="'+decode64(topic) + '" class="' + cl + '" title="'+ title + '" target="_blank">' + decode64(text) + '</a>');
}

function rdct2 (topic, cl, title, text) {
    document.write('<a href="'+decode64(topic) + '" class="' + cl + '" title="'+ title + '" target="_blank" onMouseOver="window.status=\'' + decode64(text) + '\'; return true;" onMouseOut="window.status=\'\'; return true;" >' + decode64(text) + '</a>');
}