function Ajax() {
	this.xmlhttp = null;
	this.send = function(url, statechange) {
		if(window.XMLHttpRequest) this.xmlhttp = new XMLHttpRequest();
		else if(window.ActiveXObject) this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		if(this.xmlhttp != null) {
			this.xmlhttp.onreadystatechange = statechange;
			this.xmlhttp.open("GET", url, true);
			this.xmlhttp.send(null);
		}
		else alert("Your browser doesn't support AJAX.");
	}
}