function makeRequest(url, func){
	http_request = false;
	if(window.XMLHttpRequest){ // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if(http_request.overrideMimeType){
			http_request.overrideMimeType('text/xml');
		}
	}
	else if(window.ActiveXObject){ // IE
		try{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e){
			try{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e){}
		}
	}

	if(!http_request){
		return false;
	}

	http_request.onreadystatechange = func;
	http_request.open('GET', url, true);
	http_request.send(null);
}