// move each character for obj.href 128 positions up in ascii table
// used twice, the original string is returned 
function rot128(obj)
{
	var str = obj.getAttribute("href").split("/").pop().split("");
	var decoded = "";
	
	for (i in str) decoded += String.fromCharCode((str[i].charCodeAt(0) + 128) % 256);
	
	document.location.href = decoded;
	
	return false;
}