var xmlreqs = new Array();
var dci = 0;

function CXMLReq(type, xmlhttp) {
  this.type = type;
  this.xmlhttp = xmlhttp;
}

function xmlreqGET(url) {
  var xmlhttp=false;
  if (window.XMLHttpRequest) {
    // Mozilla, etc.
    xmlhttp=new XMLHttpRequest();
    xmlhttp.onreadystatechange = xmlhttpChange;
    xmlhttp.open("GET",url,true);
    xmlhttp.send(null);
  }
  else if (window.ActiveXObject) {
    // IE
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    if (xmlhttp) {
      xmlhttp.onreadystatechange = xmlhttpChange;
      xmlhttp.open("GET",url,true);
      xmlhttp.send();
    }
  }
  var xmlreq = new CXMLReq('', xmlhttp);
  xmlreqs.push(xmlreq);
}

function xmlreqPOST(url,data) {
  if (window.XMLHttpRequest) { // Mozilla etc.
    xmlhttp=new XMLHttpRequest();
  } else if (window.ActiveXObject) { // IE
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (xmlhttp) {
    xmlhttp.onreadystatechange=xmlhttpChange;
    xmlhttp.open("POST",url,true);
    xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xmlhttp.send(data);
  }
}

function xmlhttpChange() {
  if (typeof(window['xmlreqs']) == "undefined") return;
  for (var i=0;
       i < xmlreqs.length;
       i++) {
    if (xmlreqs[i].xmlhttp.readyState == 4) {
      try {
	if (xmlreqs[i].xmlhttp.status == 200 || xmlreqs[i].xmlhttp.status == 304) {
	  // 200 OK 
	  if (document.implementation && document.implementation.createDocument) {
	    xmldoc = document.implementation.createDocument("", "", null);
	  } else if (window.ActiveXObject) {
	    xmldoc = new ActiveXObject("Microsoft.XMLDOM");
	}
	  xmldoc = xmlreqs[i].xmlhttp.responseXML;
	  xmlreqs.splice(i,1);
	  update(xmldoc);
	  i--;
	}
	else {
	  // error
	  xmlreqs.splice(i,1);
	  i--;
	}
      }
      catch (e) {
	//oups
      }
    }
  }
}