var defaultUrl = "/ComAjax.aspx";
var ComAjx = {
	_pool:[],
	_AjxObj:function(id){
		if(id == null){
			return;
		}
		this._id = id;
		this.ReNew=function(){
			if(window.XMLHttpRequest){
				this.AjxObj=new XMLHttpRequest();
			}else if(window.ActiveXObject){
				this.AjxObj=new ActiveXObject("Microsoft.XMLHTTP");
			}else{
				this.AjxObj=null;
			}
		}
	},
	_GetAjxObj:function(id){
		for(var i=0;this._pool.length>i;i++){
			if(id != null && this._pool[i]._id==id){
				if(this._pool[i].AjxObj.readyState == 0 || this._pool[i].AjxObj.readyState == 4){
					return this._pool[i];
				}
				return null;
			}
			if(id == null && this._pool[i]._id==null){
				if(this._pool[i].AjxObj.readyState == 0 || this._pool[i].AjxObj.readyState == 4){
					return this._pool[i];
				}
			}
		}
		this._pool[this._pool.length]=new this._AjxObj(id);
		return this._pool[this._pool.length-1];
	},
	SendRequest:function(typeID,method,url,param,bakFun,callBackID){
		var obj=this._GetAjxObj(typeID,bakFun);
		if(obj==null){
			return false;
		}else{
			obj.ReNew();
		}
		if(url == null || url == ""){
			url = defaultUrl;
		}
		if(url == null || url == ""){
			return false;
		}
		obj.AjxObj.onreadystatechange=function(){
			if(obj.AjxObj.readyState == 4){
				if(obj.AjxObj.status==200 && bakFun != null){
					bakFun(callBackID, obj.AjxObj.responseText);
				}
			}
		}
		var myurl=url+"?currtime="+(new Date()).getTime()+(param==null?"":"&"+param);
		if(method == "POST" || method == "Post" || method=="post"){
			obj.AjxObj.open("POST",myurl,true);
		}else{
			obj.AjxObj.open("GET",myurl,true);
		}
		obj.AjxObj.send(null);
		return true;
	}
}