function selectCurrentDate(thing) {
  $('#loading').hide();
  $$('.current').each( function(e) {
    e.removeClass('current');    
  });
  $(thing).addClass('current');
}

function filterByCategory(cat) {
  $('#project-list .column').removeClass('on');
  $('#project-list .column').hide();
  $('#project-list .column').removeClass('last');
  $("#project-list ." + cat).addClass('on');
  $("#project-list .on").show();
  $("#project-list a:visible:nth-child(5n+1)").addClass("arse");
}

function showAllCategories() {
  $('#project-list .column').removeClass('last');
  $("#project-list a.column:nth-child(5n+1)").addClass("last");
  $('#project-list .column').show();
  
}

function switchEventFocus(i) {
  $$('.more-info').each(Element.hide);
  $$('.switch').each(Element.show);
  $('#event-' + i).show();
  $('#switch-' + i).hide();
}

function rand(m,M){return M?m+rand(M-m):Math.random()*++m<<.5}

function random_logo() {
  var number = rand(1,4);
  $('#logo img').attr('src', '/images/no-risk-too-great/small/nrtg_bw_' + number +'.jpg');
}