Access Control for Cross-site Requests

Access Control for Cross-site Requests - 這東西早就該有了阿, 大佬

Firefox 3 implements the W3C Access Control working draft, which gives you the ability to do XMLHttpRequests to other web sites

Cross-Site XMLHttpRequest - MDC
John Resig - Cross-Site XMLHttpRequest

<?php header('Access-Control: allow <*>'); ?>
<b>John Resig</b>

<?xml version="1.0" encoding="UTF-8"?>
<?access-control allow="*"?>
<simple><name>John Resig</name></simple>