Ajax = function()
{
	var xmlhttp;
	var failed;
	var method;
	var responseStatus;
	var url;
	
	this.xmlhttp = null;
	this.failed = true;
	this.method = 'GET';
	this.createAJAX();
}

Ajax.prototype.createAJAX = function() {
	try {
		this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e1) {
		try {
			this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e2) {
			this.xmlhttp = null;
		}
	}

	if (! this.xmlhttp) {
		if (typeof XMLHttpRequest != "undefined") {
			this.xmlhttp = new XMLHttpRequest();
		} else {
			this.failed = true;
		}
	}
};

Ajax.prototype.runAJAX = function(urlstring, querystring, method, async) {
    var self = this;
	this.url = urlstring;
	this.query = querystring;
	
	if(method.toLowerCase() == 'get')
	{
		this.xmlhttp.open("GET", this.url, async);
		this.xmlhttp.send(null);
	}
	else if(method.toLowerCase() == 'post')
	{
	    this.xmlhttp.open("POST", this.query, async);
	    this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;");
	    this.xmlhttp.send(this.query);
	}
	
	this.xmlhttp.onreadystatechange = function() {
		if(self.xmlhttp.readyState == 4 && self.xmlhttp.status==200) {
			if (self.callback) self.callback(self.xmlhttp.responseText);
		}
	};
	
	if (!async)
	{
		if(self.xmlhttp.readyState == 4 && self.xmlhttp.status==200) {
			if (self.callback) self.callback(self.xmlhttp.responseText);
		}
	}
};