// JavaScript Document
function initRequest() {
	var 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) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	else
	{
	  return http_request;
	}
}


/*
function getResponseXML(url,$function_name) {
  http_request = initRequest();
  http_request.onreadystatechange = $function_name();
  
  
  http_request.open('GET',url,true);
  http_request.send(null);

}
*/