simplexhr={
  data:0,
  doxhr:function(url){
    if(!document.getElementById || !document.createTextNode){return;}
    var request;
    try{
      request = new XMLHttpRequest();
    }catch(error){
      try{
        request = new ActiveXObject("Microsoft.XMLHTTP");
      }catch(error){
        return true;
      }
    }
    request.onreadystatechange=function(){
      if(request.readyState == 4){
        if (request.status && /200|304/.test(request.status))
        {
          simplexhr.retrieved(request);
        } else{
          simplexhr.failed(request);
        }
      }
    }
    request.open('get',url,true);
    request.setRequestHeader('If-Modified-Since','Wed, 05 Apr 2006 00:00:00 GMT');
    request.send(null);
    return false;
  },
  retrieved:function(requester){
   	simplexhr.data = eval('('+requester.responseText+')');
    //alert('Calling ClubSelection');
    var SelectObject = document.getElementById('SClub');
    if (SelectObject.options[SelectObject.selectedIndex].value >= 0)
    {
      ClubSelection(SelectObject);
    }
    AddAllMarkers();
    return false;
  },
  failed:function(requester){
    alert('The XMLHttpRequest failed. Status: '+requester.status);
    return true;
  }
}