function hideDialogOrDefaultLink() {
  var dialog_mode = $('#dialog').css('display') != 'none'; 
  if (dialog_mode) $('#dialog').fadeOut();
  return !dialog_mode;
}

function resizeDialog(width) {
  $('#dialog').width(width);
  $('#dialog').css('margin-left', -width/2);
}

function search(search_url, force) {
  var searchString = $('#search_string').val();
  if (force || lastSearchString == searchString) return;
  lastSearchString = searchString;
  $('#posts_wrapper').fadeOut();
  window.clearTimeout(searchTimeout);
  searchTimeout = window.setTimeout(
      function () { $('#posts_wrapper').load(search_url+'?dialog=true&search_string='+searchString, null, 
        function() {
          $('#posts_wrapper').fadeIn();
        });
      }, 1000);
}