var SERVER = {
    loaded : false,
    requestobj : false,
    load : function() {
      if ( SERVER.loaded == false ) {
        this.loaded = SERVER.loadrequestobj(); //probeer te laden
      }
      return this.loaded;
    },
    loadrequestobj : function () {
      if (window.XMLHttpRequest){ // if Mozilla, Safari etc or IE7
        this.requestobj = new XMLHttpRequest();
        if ( this.requestobj.overrideMimeType ) {
          this.requestobj.overrideMimeType('text/xml');
        }
        return true;
      } else if (window.ActiveXObject) { // if IE, not IE7
        try {
          this.requestobj = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
          try {
            this.requestobj = new ActiveXObject("Microsoft.XMLHTTP");
          } catch (e) {
            return false;
          }
        }
        return true;
      }
      return false;
    },  
    GETrequest : function(url,data,func) {
      if ( !this.load() ) {
        return false;
      }
      this.requestobj.open('GET', url+'?'+data, true);
      if ( func ) {
        this.requestobj.onreadystatechange = func;
      }
      this.requestobj.send(null);
      return true;
    },
    POSTrequest : function(url,data,func) {
      if ( !this.load() ) {
        return false;
      }
      this.requestobj.open('POST', url, true);
      if ( func ) { 
        this.requestobj.onreadystatechange = func;
      }
      this.requestobj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      this.requestobj.setRequestHeader("Content-length", data.length);
      this.requestobj.setRequestHeader("Connection", "close");
      this.requestobj.send(data);
      return true;
    },
    Ontvangst : function() {
      if ( this.requestobj.readyState != 4 ) { 
        return false;
      } else if ( this.requestobj.status != 200 ) { 
        return 'Fout: ' + this.requestobj.statusText;
      } else { 
        return this.requestobj.responseText;
      }  
    }
  }