var AjaxEnabled=true;
var LayerObj=false;
var FillLayerreq=false;
function status_FillLayer(){
      if( 4 == FillLayerreq.readyState ) {
        if( 200 == FillLayerreq.status ) {
         var erg=FillLayerreq.responseXML.documentElement;
         var Obj=document.getElementById(LayerObj);
         Obj.innerHTML=erg.getElementsByTagName("body")[0].firstChild.data;
         Obj.style.display='block';
        }        
      }
}
function CloseLayer(){
 if (!LayerObj) return false;
 var Obj=document.getElementById(LayerObj);
 Obj.style.display='none';
 LayerObj=false;
}
function FillLayer(LayerId,LayerRefreshUrl){
 if (LayerObj) return false;
 LayerObj=LayerId;
 try {
                if( window.XMLHttpRequest ) {
                  FillLayerreq = new XMLHttpRequest();
                } else if( window.ActiveXObject ) {
                  FillLayerreq = new ActiveXObject( "Microsoft.XMLHTTP" );
                } else {
                  AjaxEnabled=false;
                }
                if (AjaxEnabled){
                 FillLayerreq.open("GET", LayerRefreshUrl, true);
                 FillLayerreq.onreadystatechange = status_FillLayer;
                 FillLayerreq.send( null );
                }
                return true;
 } catch( err ) {
  LayerObj=false;
  return false;
 }
}