// http-Request erzeugen; 

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

    if (http == null) http = new ActiveXObject("Msxml2.XMLHTTP");	

  }
  return http;
}