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 =
	var base64test = /[^A-Za-z0-9\+\/\=]/g;

	if (base64test.exec(inp)) { //Do some error checking
		alert("There were invalid base64 characters in the input text.\n" +
		"Valid base64 characters are A-Z, a-z, 0-9, ?+?, ?/?, and ?=?\n" +
		"Expect errors in decoding.");
	}
	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 printEmail(encoded) {
	var email = decode64(encoded);
	document.write("<a href='mailto:" + email + "'>" + email + "</a>");
}