function setSelected(){
		var action = document.forms["probeFahrt"].action;
                  var paramIndex = document.forms["probeFahrt"].db_automodell.selectedIndex;
                  action = action + '?selected=' + document.forms["probeFahrt"].db_automodell[paramIndex].value;
                  document.forms["probeFahrt"].action = action;
                  return true;
	}