function documentStage(idObjectSWFinHTML) {

  var objDocumentStage = new Object();

  objDocumentStage.clientWidth  = document.body.clientWidth;
  objDocumentStage.clientHeight = document.body.clientHeight;
  objDocumentStage.scrollTop    = document.body.scrollTop;
  objDocumentStage.scrollLeft   = document.body.scrollLeft;

  if (idObjectSWFinHTML != undefined) {

    objDocumentStage.offsetTop    = eval(idObjectSWFinHTML).offsetTop;
    objDocumentStage.offsetLeft   = eval(idObjectSWFinHTML).offsetLeft;

  }

  return objDocumentStage;

}