viewed_users.js

var viewed_users = [];

registerPlugin({
  switchTo: function(tab) {
    if (tab.id!=='user') return;
    if (last_user.split(',').length > 1) return;
    if (viewed_users.length === 0) viewed_users.push(myname);
    for (var i = 0; i < viewed_users.length; i++) if (viewed_users[i] === last_user) {
      viewed_users.splice(i,1);
      break;
    }
    viewed_users.push(last_user);
    if (viewed_users.length > 1 && !$('viewed_users')) {
      var newTab = document.createElement('a');
      newTab.href = 'javascript:void switchViewedUsers()';
      newTab.id = 'viewed_users';
      newTab.innerHTML = '▼'
      $("user").parentNode.insertBefore(newTab, $("user").nextSibling);
    }
  }
})

function switchViewedUsers() {
  switchTo("viewed_users");
  $("tw2h").innerHTML =
    '<p><button onclick="void switchUser(function(c,i,ret){ret=[];'+
    'for(i=0;i<c.length;i++) if(c[i].type===\'checkbox\'&&c[i].checked) ret.push(c[i].name);'+
    'return ret.length?ret.toString():last_user}(this.parentNode.parentNode.getElementsByTagName(\'input\')))">Show selected users</button></p>'+
    viewed_users.reverse().map(function(user) {
      return '<p><input type="checkbox" name="'+user+'" '+(user===last_user?'checked':'')+'/>'+
        '<a href="'+twitterURL+user+'" onclick="switchUser(\''+user+'\'); return false;">@'+user+'</a></p>'}
    ).join('');
}