rosa-build/app/views/wiki/_history.html.haml

= form_tag compare_path(@project, @name), :name => "compare-versions", :id => "version-form" do
  %table.wiki{:cellpadding => "0", :cellspacing => "0"}
    - @versions.each do |v|
      %tr.history
        %td.td1
          %span#niceCheckbox1.niceCheck-main{:onclick => "changeCheck(this)"}
            / = check_box_tag "versions[]", v.id, :html => {:class => 'history_cbx'}
            %input{:type => 'checkbox', :id => 'versions_', :name => 'versions[]', :value => v.id, :class => 'history_cbx'}
        %td.td2
          - user = User.where(:email => v.author.email).first
          .avatar
            = link_to user_path_by_user(user) do
              = image_tag avatar_url_by_email(v.author.email), :alt => "avatar: #{v.author.name}", :class => 'mini-gravatar'
          .name
            = link_to user_path_by_user(user) do
              %span.username= user.present? ? "#{user.uname} (#{user.name})" : v.author.name
          .both
        %td.td3
          %span.wiki-gray= "#{l v.committed_date.to_date, :format => :long}:"
          = v.message
          - if @name
            = raw "[#{link_to v.id[0..6], versioned_project_wiki_path(@project, escaped_name, v.id), :title => t("wiki.view_commit")}]"
          - else
            = "[#{v.id[0..6]}]"

:javascript
  $('.niceCheck-main').click(function() {
    var count = 0;
    $('input.history_cbx').each(function(i,el) {
      if ($(el).attr('checked')) {
        count = count + 1;
      }
    });
    if (count > 2) {
      var cbx = $( $(this).find('input.history_cbx')[0] );
      if ( cbx.attr('checked') ) {
        $(this).css('background-position', '0pt 0px');
        cbx.removeAttr('checked');
      }
    }
  });