function ddMenu(id,dir) {
  var headname = id + '-ddheader';
  var contname = id + '-ddcontent';
  var head = document.getElementById(headname);
  var cont = document.getElementById(contname);
  if(cont) {
	  if(dir == 1) {
    	cont.style.display = 'block';
	  } else {
    	cont.style.display = 'none';
	  }
  }
}