function createXMLHttpRequest() {
	if (window.ActiveXObject) {
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if (window.XMLHttpRequest) {
		xmlHttp = new XMLHttpRequest();
	}
}

function AjaxRequest(url, data, callback)
{
	var async = typeof(callback) == "function";

	if(async) xmlHttp.onreadystatechange = callback;
	xmlHttp.open("GET", url, async);
	xmlHttp.send(data);
}