var hideEvents = new Array();

function show(element) {
  for (var x=0; x<hideEvents.length; x++)
    if (hideEvents[x][1] == element)
      clearTimeout(hideEvents[x][0]);

  element.style.display = 'block';
}

function hide(element) {
  var func = function() { element.style.display = 'none'; }
  var id;
 
  id = setTimeout(func, 400);
  hideEvents.push(new Array(id, element));
}