function c_at_hideAll()
{
  if (document.forms[0].c_at != null)
  {
    if (document.forms[0].c_at.checked == false) {changeObjectVisibility("c_at_QS","hidden","none");}
  }

//  if (document.crForm.c_at.checked == false) {changeObjectVisibility("c_at_QS","hidden","none");}
}