AJAXRequest v0.2

<script type="text/javascript" src="ajaxrequest.js"></script>
<script type="text/javascript">
// 请求方式GET，URL为default.asp，异步
var ajaxobj=new AJAXRequest("GET","default.asp",true,null,MyCallback);    // 创建AJAX对象
ajaxobj.send();    // 发送请求
function MyCallback(xmlObj) {
     document.write(xmlobj.responseText);
}

/*------------------------------------------
Author: xujiwei
Website: http://www.xujiwei.cn
E-mail: vipxjw@163.com
Copyright (c) 2006, All Rights Reserved
------------------------------------------*/
function AJAXRequest(pmethod,purl,pasync,pcontent,pcallback) {
    var xmlObj = false;
    var CBfunc,ObjSelf;
    ObjSelf=this;
    try { xmlObj=new XMLHttpRequest; }
    catch(e) {
        try { xmlObj=new ActiveXObject("MSXML2.XMLHTTP"); }
        catch(e2) {
            try { xmlObj=new ActiveXObject("Microsoft.XMLHTTP"); }
            catch(e3) { xmlObj=false; }
        }
    }
    if (!xmlObj) return false;
    this.method=pmethod;
    this.url=purl;
    this.async=pasync;
    this.content=pcontent;
    this.callback=pcallback;
    this.send=function() {
        if(!this.method||!this.url||!this.async) return false;
        xmlObj.open (this.method, this.url, this.async);
        if(this.method=="POST") xmlObj.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
        xmlObj.onreadystatechange=function() {
            if(xmlObj.readyState==4) {
                if(xmlObj.status==200) {
                    ObjSelf.callback(xmlObj);
                }
            }
        }
        if(this.method=="POST") xmlObj.send(this.content);
        else xmlObj.send(null);
    }
}