var atsynonym  = 'crypto';
var dotsynonym = 'spam';

function decodeString(myEncStr) {
	var tmp;
	tmp = myEncStr.replace( eval("/" + atsynonym + "/"), '@');
	tmp = tmp.replace( eval("/" + dotsynonym + "/g"), '.');
	return(tmp);
}

function printLink(myEncStr, withclass) {
  var decStr = decodeString(myEncStr);
  with ( document ) {
    open();
    document.writeln(decStr);
    close();
  }
}