var tab_masks = '';

function collapseBox(id, container, dopen, dclose, group){
  var box = ge(id);
  if (!box) return;
  
  var masks = (group) ? group_tab_masks : tab_masks;
  var cookie_key = (group) ? 'group_closed_tabs' : 'closed_tabs';
      
  var c = geByClass("c", box)[0];
  if (!c) return;
  var newClass = isVisible(c) ? "bShut" : "bOpen";
  if (slideToggle(c, 300, function() {
    if (!masks[id]) return;
    var closed_tabs = parseInt(getCookie('remix' + cookie_key));
    if (isVisible(c)) {
      closed_tabs = isNaN(closed_tabs) ? 0 : closed_tabs & ~masks[id];
    } else {
      closed_tabs = isNaN(closed_tabs) ? masks[id] : closed_tabs | masks[id];
    }
    setCookie('remix' + cookie_key, closed_tabs, 360);
  })) {
    container.parentNode.className = newClass;
  }
  
  return false;
}