Simple Ajax Wrapper

var AjaxObject = function() {
    this.xmlHttp = null
    this.transport = null
    this.method = "post"
    this.url = ""
    this.div = ""
 
    this.create = function(url, transport, method) {
        this.xmlHttp = initialize()
        this.transport = transport
        this.url = url
        this.method = method
    }
 
    this.request = function(params,div) {
        this.div = div
        var string = this.url + "?" + params
        this.xmlHttp.open(this.method,string,true)
        this.xmlHttp.onreadystatechange = this.transport
        this.xmlHttp.send(null)
    }
 
    this.getData = function() {
        if (this.xmlHttp.readyState == 4) {
            return this.xmlHttp.responseText
        }
        return null
    }
 
    this.getDiv = function() {
        return this.div
    }
 
    function initialize() {
        var xmlHttp=null
            try {
                xmlHttp=new XMLHttpRequest()
            } catch (e) {
                try {
                    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP")
                } catch (e) {
                    try {
                      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP")
                    } catch (e) {
                      alert("Your browser does not support AJAX, please upgrade!")
                      return false
                    }
                }
            }
        return xmlHttp
    }
}
 
//this would be used like this...
 
  var chat = new AjaxObject()
 
chat.create("ajaxChatActions.jsp",chatCallBack,"post")             
 
            function chatCallBack() {
                var response = chat.getData()
                if (response != null) {
                    var div = chat.getDiv()
                }
            }    
 
//and a request would be sent like this
 
chat.request('action=send&random=' + Math.random(),'yourdiv')