// ajaxClass -- XMLHttp Object Pool and XMLHttp chunnel Pool

// == written by Apple <zysp322@gmail.com> ===

// == Copyright (C) 2006 Apple Blog - http://www.applelife.cn ==





var Request = new function(){



this.pool = new Array();



this.getXMLHttp = function (chunnel)

{

	

 if(chunnel != null)

 {

  for (var a = 0; a < this.pool.length; a++)

  {

   if(this.pool[a]["chunnel"] == chunnel)

   {

	if(this.pool[a]["obj"].readyState == 0 || this.pool[a]["obj"].readyState == 4)

    {

     return this.pool[a]["obj"];

    }

	else 

	{

      return "busy";

	}

   }

  }

  

  this.pool[this.pool.length] = new Array();

  this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();

  this.pool[this.pool.length - 1]["chunnel"] = chunnel;

  return this.pool[this.pool.length - 1]["obj"];

 

 }

	

 for (var i = 0; i < this.pool.length; i++)

 {

  if (this.pool[i]["obj"].readyState == 0 || this.pool[i]["obj"].readyState == 4)

  {

   return this.pool[i]["obj"];

  }

 }

 

 this.pool[this.pool.length] = new Array();

 this.pool[this.pool.length - 1]["obj"] = this.createXMLHttp();

 this.pool[this.pool.length - 1]["chunnel"] = "";

 return this.pool[this.pool.length - 1]["obj"];



}



this.createXMLHttp = function ()

{

 

 if(window.XMLHttpRequest)

 {

  var xmlObj = new XMLHttpRequest();

 } 

 else 

 {

  var MSXML = ['Microsoft.XMLHTTP', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];

  for(var n = 0; n < MSXML.length; n++)

  {

   try

   {

    var xmlObj = new ActiveXObject(MSXML[n]);        

    break;

   }

   catch(e)

   {

   }

  }

 } 

 

 return xmlObj;



}



this.reSend = function (url,data,callback,chunnel)

{

 var objXMLHttp = this.getXMLHttp(chunnel)

 

 if(typeof(objXMLHttp) != "object")

 {

   return ;

 }

 

 url += (url.indexOf("?") >= 0) ? "&nowtime=" + new Date().getTime() : "?nowtime=" + new Date().getTime();



 if(data == "")

 {

  objXMLHttp.open('GET' , url, true);

  objXMLHttp.send('');

 }

 else 

 { 

  objXMLHttp.open('POST' , url, true);

  objXMLHttp.setRequestHeader("Content-Length",data.length); 

  objXMLHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

  objXMLHttp.setRequestHeader("charset","utf-8");

  objXMLHttp.send(data);

 }

 

 if(typeof(callback) == "function" )

 {

  objXMLHttp.onreadystatechange = function ()

  {

   if (objXMLHttp.readyState == 4)

   {

    if(objXMLHttp.status == 200 || objXMLHttp.status == 304)

    {

     callback(objXMLHttp) 

    }

    else

    {

     alert("Error loading page\n"+ objXMLHttp.status +":"+ objXMLHttp.statusText);

    }

   }

  }

 }



}



}



function initxmlhttprequest(httpObj){

	 

	//document.getElementById("sinfo").innerHTML = info;
	var obj = httpObj.responseText ;
 	eval(obj);	

}