function getHTTPObject() {
  var xmlhttp;
  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
		xmlhttp = new XMLHttpRequest();
		if (xmlhttp.overrideMimeType) {
			xmlhttp.overrideMimeType('text/xml');
			// See note below about this line
		}
	} else if (window.ActiveXObject) { // IE
		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!xmlhttp) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
  return xmlhttp;
}
var http = getHTTPObject(); // We create the HTTP Object