function rest() {
                var XMLHttpFactories = [
                    function () {return new XMLHttpRequest()},
                    function () {return new ActiveXObject("Msxml2.XMLHTTP")},
                    function () {return new ActiveXObject("Msxml3.XMLHTTP")},
                    function () {return new ActiveXObject("Microsoft.XMLHTTP")}
                ];
                var xmlhttp = false;
                for (var i = 0; i < XMLHttpFactories.length; i++) {
                    try {
                        xmlhttp = XMLHttpFactories[i]();
                    } catch (e) {
                        continue;
                    }
                    break;
                }
                // 建立XMLHttpRequest对象
                this.xmlhttp = xmlhttp;
            }
            rest.prototype._get = function(url, data) {
                var xmlhttp = this.xmlhttp;
                xmlhttp.open ('GET', url + "&" + data, false);
                xmlhttp.send (null);
                return xmlhttp.responseText;
            };
            rest.prototype._post = function(url,  data) {
                var xmlhttp = this.xmlhttp;
                xmlhttp.open ('POST', url, false);
                xmlhttp.setRequestHeader ("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
                xmlhttp.setRequestHeader ("Content-Length", data.length);
                xmlhttp.send (data);
                return xmlhttp.responseText;
            };
            rest.prototype.get = function(url, data) {
                url = url += "?op=GET";
                return this._get(url, data);
            }
            rest.prototype.post = function(url,  data) {
                url = url += "?op=POST";
                return this._post(url, data);
            }
            rest.prototype.put = function(url, data) {
                url = url += "?op=PUT";
                return this._post(url, data);
            };
            rest.prototype.del = function(url, data) {
                url = url += "?op=DELETE";
                return this._get(url, data);
            };
            function t() {
                var restobj = new rest();
                document.write (restobj.get("http://localhost/test/service.php", "content=GET Content"));
                document.write (restobj.post("http://localhost/test/service.php", "content=POST Content"));
                document.write (restobj.put("http://localhost/test/service.php", "content=PUT Content"));
                document.write (restobj.del("http://localhost/test/service.php",  "content=DELETE Content"));
            }
            t();

<?php
/**
* REST后台程序简单示例
*/
class Resource {
    public function get($request) {
        echo 'content=', $request['content'], "; get resource Successful<br />";
    }
    public function post($request) {
        echo 'content=', $request['content'], "; post resource Successful<br />";
    }
    public function put($request) {
        echo 'content=', $request['content'], "; update resource Successful<br />";
    }
    public function delete($request) {
        echo 'content=', $request['content'], "; delete resource Successful<br />";
    }
}
$request = $_REQUEST;
$op = $request['op'];
$op = strtolower($op);
$ops = array(
    'get' => 1,
    'post' => 1,
    'put' => 1,
    'delete' => 1,
        );
if (!isset($ops[$op])) {
    die('input error!');
}
$resource = new Resource();
$resource->$op($request);
?>