Since all google results are messed up, here's my xor encryption version made in 5 minutes.<br/>
<br/>
String1: <input id=str size=80 /> <br/>
String2: <input id=key size=80 /> <br/>
<input type=button onclick="$('output').value = xorify($('str').value, $('key').value);" value=run /><br/>
Hex output: <input id=output />

<script src="/rp/js/lib.js"></script>
<script>
	function xorify(str, key) {
		var output = "";
		for (var i = 0; i < Math.max(str.length, key.length); i++) {
			output += (str.charCodeAt(i % str.length) ^ key.charCodeAt(i % key.length)).toString(16);
		}
		return output;
	}
</script>