menuloaded = false;
function chgimg(id, imgt) { 
  var locked = false;
  try {
	eval("if ( sous" + id + "open == true){locked=true;}");
  } catch (e){
	//
  }
  if (!(locked)) {
	if ((menuloaded) && (id)) {
	  eval('img = ' + imgt + ';');
	  eval('document[id].src = img.src;');
	  return true;
	} else {
	  return false;
	}
  }
}